[Tutor] List manipulation

[Srinivas Iyyer]

Dear group:

I have a data like this:
10      15
16      20
25      35
45      50
55      60
61      65
75      80

Since 15 precedes 16, I want to consider 10:20 as one
unit.  If I repeat completely for data

I would get:
10      20
25      35
45      50
55      65
75      80

test = ['10\t15', '16\t20', '25\t35', '45\t50',
'55\t60', '61\t65', '75\t80']


I cannot think a way to do this in simple. Could
members suggest some way to solve this please. 

thanks




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