for /f "tokens=1-3 delims= " %%i in (d:a.txt) do (
    set/a n+=1
    call :label "!n!" str
    echo,%%i %%j %%k !str!
)
pause>exit

:label
for /f "tokens=1-2 delims= " %%i in (d:b.txt) do (
    set/a a+=1
    if !a! equ %~1 set "%2=%%j"&goto :eof
)
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@echo off
for /f "tokens=1-3" %%a in (a.txt) do for /f "tokens=2" %%i in ('findstr /b %%a b.txt') do echo;%%a %%b %%c %%i
pause
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gawk "NR==FNR{a[$1]=$2\" \"$3}NR>FNR{print $0,a[$1]}" b.txt a.txt > c.txt
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setlocal enabledelayedexpansion
if not exist "%~dp1b.txt" exit
for /f "usebackq tokens=1,* delims=	 " %%i in ("%~dp0a.txt")do (
 set "data=%%i"&&call:1
 echo,%%i %%j !backup!
)
pause
goto:eof
:1
set "backup="
for /f "usebackq tokens=1,* delims=	 " %%i in ("%~dp0b.txt")do if "%data%"=="%%i" set "backup=%%j"&&goto:eof
goto:eof
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