cradcliff% ./crc16-modular.pl foo
CRC16 in decimal: 1736882148
CRC16 in hex:
  b7e4
cradcliff% ./crc16-modular.pl foobar
CRC16 in decimal: 3375757715
CRC16 in hex:
  f993
cradcliff% ./crc16-modular.pl foobaz
CRC16 in decimal: 3375757723
CRC16 in hex:
  f99b