Sample Input:    Sample Output:
6                2 3
2 3              RT,
2 4              RT,
3 3              ,
3 4              B,
4 2              ,
4 3              .

I just wonder why there is only one comma on the end.
It seems that there should be two - first for squere "4 2" and second
squere "3 4".

So my question is what does this last comma referrs to ?
And obvious - why the other comma isn't in the output ?

Thank You.
Mike

Read correct the task !!


There you can see that then last line contains '.' not ',' !

Point ends last line of input.

Last line is NOT ONLY POINT!
Last line may be the following:
RT.

POINT using at the last line instead of comma.

well i think
it must be '.' at last..
because if it can go on .. it will print R L T  B ..

when print '.'   it means at this time it can't go ...

+10086