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@echo off

setlocal enabledelayedexpansion

for /f "tokens=*" %%i in (a.txt) do (
        set y=false
        for %%j in (%%i) do (
                set t=%%j
                if "!y!" equ "false" if "!t:~7,1!" neq "" if "!t:~8,1!"=="" set y=true&echo %%j
        )
       
)

pause

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  1. @echo off
  2. setlocal enabledelayedexpansion
  3. for /f "tokens=*" %%i in (a.txt) do (
  4. set y=false
  5. for %%j in (%%i) do (
  6. set t=%%j
  7. if "!y!" equ "false" if "!t:~7,1!" neq "" if "!t:~8,1!"=="" set y=true&echo %%j
  8. )
  9. )
  10. pause
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