wason.py

#!/usr/bin/env python
#
#   File: wason.py
# Author: Michael David Plotz
#   Date: Thu Jan 9 23:15:20 PST 2014
#

import re

def is_num(arg):
    try:
        int(arg)
    except ValueError:
        return False
    return True

def main():
    while True:
        try:
            user_input = raw_input()
        except EOFError:
            break

        # remove whitespace and split by commas
        values = re.split("(?:\s|,)+", user_input)
        # remove empty fields
        values = [val for val in values if val != ""]

        # ensure valid input
        if len(values) != 3:
            continue

        values = [int(val) for val in values if is_num(val)]
        if len(values) != 3:
            continue

        # apply the rule
        if values[0] < values[1] and values[1] < values[2]:
            print "Yes"
        else:
            print "No"

if __name__ == '__main__': main()