Change leading number

@echo off
setlocal enabledelayedexpansion
set text=
set newline=^& echo.
FOR /F %%i in (numbers.txt) DO (
    set tempVar=%%i
    set tempVar=!tempVar:~1!
    set tempVar=1!tempVar!^!newline!
    set text=!text!!tempVar!
)

echo %text%