#C, 120 151 140 111 108 105 104 92 90 Bytes
C, 120 151 140 111 108 105 104 92 90 Bytes
Working for "It's Jimmy's test" --> Bl'B Bleet'B Blet
j;f(char*m){for(;*m=!isalpha(*m++)?j=0,*(m-1):"*Blet"[isalpha(*m)?j^3?++j:j:j>1?4:++j];);}
The output is now a side effect by destroying the original string.
main(c,v)char**v;{
char test[] = "The End is near Fellows!";
f(test);puts(test);
char test2[] = "We praise the Goat God!";
f(test2);puts(test2);
char test3[] = "It's Jimmy's test";
f(test3);puts(test3);
char test4[] = "0te_st1";
f(test4);puts(test4);
char test5[] = "I have a pen";
f(test5);puts(test5);
char test6[] = "_0123456789_";
f(test6);puts(test6);
}
I think it's correct at least now
Blt Blt Bl Blet Bleeeet!
Bl Bleeet Blt Blet Blt!
Bl'B Bleet'B Blet
0Bl_Bl1
B Blet B Blt
_012345678_