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Find out majority

T_List is a list of the voting results (each letter represents a candidate).
Find out which letter constitutes a majority of the list and write it down in T_Out.
There is always one letter on the T_List that constitutes a majority.

* Very challenge is this: Don't move R/W head of universal tape(don't use 'left', 'right', 'seekL', 'seekR' or such. Only writing.)!