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#! perl -slw use strict; ... a 1 | b 2 | c 3 | d 4 | e 5 | f 6 | g 7 | h 8 | i 9 | j 10 a1 | b2 | c3 | d4 | e5 | f6 | g7 | h8 | i9 | j10 a11 | b22 | c33 | d44 | e55 | f66 | g77 | h88 | i99 | j1010