Pet3ris

%lang starknet
%builtins pedersen range_check bitwise

from starkware.cairo.common.cairo_builtins import BitwiseBuiltin, HashBuiltin
from starkware.cairo.common.bitwise import bitwise_and
from starkware.cairo.common.math import assert_nn_le

const WORD = 2 ** 16
const MASK = WORD - 1
const MASK2 = MASK * WORD