#!/usr/bin/env python3 import sys alphabet = 'MNOPQRSTUVWXYZABCDEFGHIJKL' with open(sys.argv[1]) as f: lines = f.readlines() for c in alphabet: for line, row in zip(lines, range(len(lines))): for l, col in zip(line, range(len(line))): if l == c: print("%s,%s," % (row,col), end=' ') print("255,255")