2 added 59 characters in body
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Perl 5, 3130 bytes

30-1 byte thanks to @Neil (31& instead of -96+).

29 bytes of code + -p flag.

$@+=-96+ord$@+=31&ord for/./g;$_=$@==100

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Perl 5, 31 bytes

30 bytes of code + -p flag.

$@+=-96+ord for/./g;$_=$@==100

Try it online!

Perl 5, 30 bytes

-1 byte thanks to @Neil (31& instead of -96+).

29 bytes of code + -p flag.

$@+=31&ord for/./g;$_=$@==100

Try it online!

1
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Perl 5, 31 bytes

30 bytes of code + -p flag.

$@+=-96+ord for/./g;$_=$@==100

Try it online!