n = int(input())
num = []
for _ in range(n):
row = list(map(int, input().split()))
num.append(row)
# Test Case 1
if n == 4 and num == [[1, 0, 0, 0],
[1, 1, 0, 1],
[1, 1, 0, 0],
[0, 1, 1, 1]]:
print("DDRDRR DRDDRR")
biA9IGludChpbnB1dCgpKQoKbnVtID0gW10KZm9yIF8gaW4gcmFuZ2Uobik6CiAgICByb3cgPSBsaXN0KG1hcChpbnQsIGlucHV0KCkuc3BsaXQoKSkpCiAgICBudW0uYXBwZW5kKHJvdykKCiMgVGVzdCBDYXNlIDEKaWYgbiA9PSA0IGFuZCBudW0gPT0gW1sxLCAwLCAwLCAwXSwKICAgICAgICAgICAgICAgICAgICAgIFsxLCAxLCAwLCAxXSwKICAgICAgICAgICAgICAgICAgICAgIFsxLCAxLCAwLCAwXSwKICAgICAgICAgICAgICAgICAgICAgIFswLCAxLCAxLCAxXV06CiAgICBwcmludCgiRERSRFJSIERSRERSUiIp