ppll2030

@echo off
setlocal enabledelayedexpansion
for /f "tokens=1* delims=:" %%A in ('findstr /n "bcdefg" "000.txt"') do set n=%%A
set LF=0
for /f "tokens=1* delims=:" %%i in ('findstr /n .* "000.txt"') do (
    set f=%%j
    set /a LF+=1
    set /a o=!n!+1
    set /a t=!n!+2
    if !LF! equ !o! echo;!f!>>000.out.txt
    if !LF! equ !t! echo;!f!>>000.out.txt
)
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