#!/usr/bin/env python

#program to add minutes and seconds

min1,sec1 = input("Enter minutes, seconds: ")
min2,sec2 = input("Enter minutes, seconds: ")

min = min1 + min2
sec = sec1 + sec2
min = min + (sec/60)
sec = sec % 60

print "sum = ",min," minutes ",sec," seconds"


# looping version.

min,sec = 0,0    # initialize running sums
min1,sec1 = 1,1  # must initialize so while loop will start.

while min1!=0 or sec1!=  # while "or" instead of "and"?
    min1,sec1 = input("Enter minutes, seconds, 0,0 to stop: ")
    min = min + min1
    sec = sec + sec1
    min = min + (sec/60)
    sec = sec % 60
    print "sum = ",min," minutes ",sec," seconds"
#end while loop: comments like this help with the indentation.