test.py

print "Hello! Input format HH:MM"
time = str(raw_input("Time - "))
splittedTime = time.split(":")
try:
    splittedTime = [int(i) for i in splittedTime]
except ValueError:
    print "Invalid input"
    exit()
splittedTime = [int(i) for i in splittedTime]
if splittedTime[0] > 23 or splittedTime[1] > 59:
    print "Invalid input"
    exit()
else:
    if int(splittedTime[0]) > 12:
        splittedTime[0] = int(splittedTime[0]) - 12
    degrees = abs(splittedTime[0] * 30 - splittedTime[1] * 6)
    if degrees == 360:
        print 0
    else:
        print degrees