#!/usr/bin/env python3

import sys
import pprint

if len(sys.argv) < 2:
    print('No file specified.')
    sys.exit()

words = dict()
with open(sys.argv[1]) as fd:
    for line in fd.readlines():
        line = line.strip().lower()
        for c in line:
            if c != '':
                words[c] = words.get(c, 0) + 1
with open('letters.out', 'w') as fd:
    for item in words.items():
        fd.write('{}\n'.format(item))