batman

@echo off&setlocal enabledelayedexpansion
for %%i in (a b c d e f g h i j k l m n o p q r s t u v w x y z) do (
    set /a n+=1&set "code=!code! %%i#!n!"
)
set /p str=请输入字母：
:lp
for %%a in (%code%) do (
    for /f "tokens=1,2 delims=#" %%i in ("%%a") do (
        if /i "%str:~,1%" equ "%%i" set /a num+=%%j
    )
)
set "str=%str:~1%"
if defined str goto lp
echo %num%&pause>nulCOPY