def do(tuples):
for x,y in tuples:print' '*x+'-'*(y-x)
def main():
tests = [(),
((0,7),(5,6),(3,6)),
((5,20),(5,20),(2,10),(15,19)),
((28, 35), (34, 40), (39, 44))]
c = 1
for t in tests:
print `c`,"=>"
do(t)
c+=1
if __name__=='__main__':
main()
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