>> >>> for i in range(3):
>>
>> for j in range(10):
>> print "%d%d" % (i,j),
>> print
>>
>>
>> 00 01 02 03 04 05 06 07 08 09
>> 10 11 12 13 14 15 16 17 18 19
>> 20 21 22 23 24 25 26 27 28 29
>>
o = ''
for i in range(3):
for j in range(10):
o += "%s%s" % (i,j)
print o
o = ''