10 added 47 characters in body

## Python 3, 157145123108115139161158158 153 bytes

Saved 22 thanks to Lynn. 17 saved thanks to shooqie. 3 saved thanks to ljeabmreosn. 5 saved thanks to Geoff Reedy.

a,b=eval(input())
s='-'
c='bleen'
d=a<b
l=list(map(str,range(-10,11)))[::[-1,1][d]]
lx=l.insert
y=l.index
x(4,d*s+c)
l.insertx(18,(1^d)*s+c)
print(l[l.indexl[y(a):l.indexy(b)+1])


Input like '-10', '8'. Tips are welcome for a beginner.

Added 7 to account for -bleen. Added 15 to account for reversed input like '8','-10'. Added a large 21 to account for the reversed input signs for bleen vs -bleen.

## Python 3, 157145123108115139161158 bytes

Saved 22 thanks to Lynn. 17 saved thanks to shooqie. 3 saved thanks to ljeabmreosn.

a,b=eval(input())
s='-'
c='bleen'
d=a<b
l=list(map(str,range(-10,11)))[::[-1,1][d]]
l.insert(4,d*s+c)
l.insert(18,(1^d)*s+c)
print(l[l.index(a):l.index(b)+1])


Input like '-10', '8'. Tips are welcome for a beginner.

Added 7 to account for -bleen. Added 15 to account for reversed input like '8','-10'. Added a large 21 to account for the reversed input signs for bleen vs -bleen.

## Python 3, 157145123108115139161158 153 bytes

Saved 22 thanks to Lynn. 17 saved thanks to shooqie. 3 saved thanks to ljeabmreosn. 5 saved thanks to Geoff Reedy.

a,b=eval(input())
s='-'
c='bleen'
d=a<b
l=list(map(str,range(-10,11)))[::[-1,1][d]]
x=l.insert
y=l.index
x(4,d*s+c)
x(18,(1^d)*s+c)
print(l[y(a):y(b)+1])


Input like '-10', '8'. Tips are welcome for a beginner.

Added 7 to account for -bleen. Added 15 to account for reversed input like '8','-10'. Added a large 21 to account for the reversed input signs for bleen vs -bleen.

9 Rollback to Revision 7

## Python 3, 157145123108115139161161 158 bytes

Saved 22 thanks to Lynn. 17 saved thanks to shooqie. 3 saved thanks to ljeabmreosn.

a,b=eval(input())
s=['s='-','']
c='bleen'
d=a<b
l=list(map(str,range(-10,11)))[::[-1,1][a<b]]1][d]]
l.insert(4,s[a>b]+cd*s+c)
l.insert(18,s[a<b]+c(1^d)*s+c)
print(l[l.index(a):l.index(b)+1])


Input like '-10', '8'. Tips are welcome for a beginner.

Added 7 to account for -bleen. Added 15 to account for reversed input like '8','-10'. Added a large 21 to account for the reversed input signs for bleen vs -bleen.

## Python 3, 157145123108115139161 bytes

Saved 22 thanks to Lynn. 17 saved thanks to shooqie. 3 saved thanks to ljeabmreosn.

a,b=eval(input())
s=['-','']
c='bleen'
l=list(map(str,range(-10,11)))[::[-1,1][a<b]]
l.insert(4,s[a>b]+c)
l.insert(18,s[a<b]+c)
print(l[l.index(a):l.index(b)+1])


Input like '-10', '8'. Tips are welcome for a beginner.

Added 7 to account for -bleen. Added 15 to account for reversed input like '8','-10'. Added a large 21 to account for the reversed input signs for bleen vs -bleen.

## Python 3, 157145123108115139161 158 bytes

Saved 22 thanks to Lynn. 17 saved thanks to shooqie. 3 saved thanks to ljeabmreosn.

a,b=eval(input())
s='-'
c='bleen'
d=a<b
l=list(map(str,range(-10,11)))[::[-1,1][d]]
l.insert(4,d*s+c)
l.insert(18,(1^d)*s+c)
print(l[l.index(a):l.index(b)+1])


Input like '-10', '8'. Tips are welcome for a beginner.

Added 7 to account for -bleen. Added 15 to account for reversed input like '8','-10'. Added a large 21 to account for the reversed input signs for bleen vs -bleen.

8 deleted 13 characters in body

## Python 3, 157145123108115139161 158161 bytes

Saved 22 thanks to Lynn. 17 saved thanks to shooqie. 3 saved thanks to ljeabmreosn.

a,b=eval(input())
s='s=['-','']
c='bleen'
d=a<b
l=list(map(str,range(-10,11)))[::[-1,1][d]]1][a<b]]
l.insert(4,d*s+cs[a>b]+c)
l.insert(18,(1^d)*s+cs[a<b]+c)
print(l[l.index(a):l.index(b)+1])


Input like '-10', '8'. Tips are welcome for a beginner.

Added 7 to account for -bleen. Added 15 to account for reversed input like '8','-10'. Added a large 21 to account for the reversed input signs for bleen vs -bleen.

## Python 3, 157145123108115139161 158 bytes

Saved 22 thanks to Lynn. 17 saved thanks to shooqie. 3 saved thanks to ljeabmreosn.

a,b=eval(input())
s='-'
c='bleen'
d=a<b
l=list(map(str,range(-10,11)))[::[-1,1][d]]
l.insert(4,d*s+c)
l.insert(18,(1^d)*s+c)
print(l[l.index(a):l.index(b)+1])


Input like '-10', '8'. Tips are welcome for a beginner.

Added 7 to account for -bleen. Added 15 to account for reversed input like '8','-10'. Added a large 21 to account for the reversed input signs for bleen vs -bleen.

## Python 3, 157145123108115139161 bytes

Saved 22 thanks to Lynn. 17 saved thanks to shooqie. 3 saved thanks to ljeabmreosn.

a,b=eval(input())
s=['-','']
c='bleen'
l=list(map(str,range(-10,11)))[::[-1,1][a<b]]
l.insert(4,s[a>b]+c)
l.insert(18,s[a<b]+c)
print(l[l.index(a):l.index(b)+1])


Input like '-10', '8'. Tips are welcome for a beginner.

Added 7 to account for -bleen. Added 15 to account for reversed input like '8','-10'. Added a large 21 to account for the reversed input signs for bleen vs -bleen.

7 deleted 63 characters in body
6 added 196 characters in body
5 deleted 11 characters in body
4 added 61 characters in body
3 added 22 characters in body
2 added 17 characters in body
1