#! /usr/bin/gawk -f

# Assumes the input text has been reversed (with "tac")
# Prepends each input line with its sequential number from the end of the paragraph (starting with 1)

BEGIN { NLIN=0 }

/./ {
  if ( /=/ ) NLIN=0
  NLIN++
  printf "%3d %s\n", NLIN, $0
}