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#!/usr/local/bin/perl -s ... Driver: sum_1_SUM0_0 1 INT_NET Net : N_5 Driver: sum_1_CO0_i
# Output. perl x.pl -BUG_MODE=0 ; perl x.pl -BUG_MODE=1 ; ... 2 INT_NET Net : c_c 2 INT_NET Net : b_c 2 INT_NET Net : a_c