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#!/usr/bin/python
import readline # noqa
def parse_time(s):
h, m = map(int, s.strip().split(':'))
return h * 60 + m
def fmt_delta(mins):
sign = mins < 0 and "-" or ""
mins = abs(mins)
if mins >= 60:
h = mins / 60
m = mins % 60
return "%s%d min (%d hr, %d min)" % (sign, mins, h, m)
else:
return "%s%d min" % (sign, mins)
while True:
try:
what = raw_input("start, end> ")
except EOFError:
print
break
try:
if ',' in what:
t1, t2 = map(parse_time, what.split(','))
else:
t1, t2 = map(parse_time, what.split())
print fmt_delta(t2 - t1)
except ValueError:
print eval(what)
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