4cd1b7b2 ​

input = #0
output = #1
(OList OList Color, OList OList Color)
([[blue, black, green, yellow], [black, black, red, blue], [red, blue, yellow, black], [black, green, blue, red]], [[blue, red, green, yellow], [green, yellow, red, blue], [red, blue, yellow, green], [yellow, green, blue, red]])
([[black, yellow, red, green], [yellow, blue, black, red], [black, green, yellow, black], [green, black, blue, yellow]], [[blue, yellow, red, green], [yellow, blue, green, red], [red, green, yellow, blue], [green, red, blue, yellow]])
([[green, black, red, blue], [blue, black, black, black], [yellow, green, black, red], [black, blue, yellow, green]], [[green, yellow, red, blue], [blue, red, green, yellow], [yellow, green, blue, red], [red, blue, yellow, green]])
([[black, blue, red, green], [black, green, blue, black], [green, black, yellow, blue], [black, yellow, black, red]], ?)