Grid: 18, 36, 21, 39|21, 36, 24, 39|24, 36, 27, 39|27, 36, 30, 39|30, 36, 33, 39|33, 36, 36, 39|36, 36, 39, 39|45, 36, 48, 39|48, 36, 51, 39|51, 36, 54, 39|54, 36, 57, 39|57, 36, 60, 39|60, 36, 63, 39|63, 36, 66, 39|24, 39, 27, 42|30, 39, 33, 42|33, 39, 36, 42|51, 39, 54, 42|57, 39, 60, 42|60, 39, 63, 42|24, 42, 27, 45|30, 42, 33, 45|51, 42, 54, 45|57, 42, 60, 45|24, 45, 27, 48|30, 45, 33, 48|51, 45, 54, 48|57, 45, 60, 48|24, 48, 27, 51|30, 48, 33, 51|51, 48, 54, 51|57, 48, 60, 51|24, 51, 27, 54|30, 51, 33, 54|51, 51, 54, 54|57, 51, 60, 54|24, 54, 27, 57|30, 54, 33, 57|51, 54, 54, 57|57, 54, 60, 57|24, 57, 27, 60|57, 57, 60, 60|24, 60, 27, 63|30, 60, 33, 63|51, 60, 54, 63|57, 60, 60, 63|24, 63, 27, 66|30, 63, 33, 66|51, 63, 54, 66|57, 63, 60, 66|24, 66, 27, 69|30, 66, 33, 69|51, 66, 54, 69|57, 66, 60, 69|24, 69, 27, 72|30, 69, 33, 72|51, 69, 54, 72|57, 69, 60, 72|24, 72, 27, 75|30, 72, 33, 75|51, 72, 54, 75|57, 72, 60, 75|24, 75, 27, 78|30, 75, 33, 78|51, 75, 54, 78|57, 75, 60, 78|18, 78, 21, 81|21, 78, 24, 81|33, 78, 36, 81|36, 78, 39, 81|45, 78, 48, 81|48, 78, 51, 81|60, 78, 63, 81|63, 78, 66, 81