use constants
use constants

Signed-off-by: Andre Dublin <6e9f53034265622db7920a2c7c0e90d4409ecbf9@gmail.com>

jpfuentes2/iterated-prisoners-dilemma,jpfuentes2/iterated-prisoners-dilemma,jpfuentes2/iterated-prisoners-dilemma,jpfuentes2/iterated-prisoners-dilemma,jpfuentes2/iterated-prisoners-dilemma