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bit 111111 offset 7654321054321098 vector 0000000000000000
$ perl -Mstrict -Mwarnings -E ' say q{ 76543210}; ... A - 65 - 01000001 B - 66 - 01000010 $
$ perl -Mstrict -Mwarnings -E ' my $vec; ... AB 0100000101000010 $