5 7 next to 6 4 July 8, 2019 16 32 64 128 5 7 to 6 4 5 7 to 6 4 height difference 5 7 compared to 6 4 5 7 6 4 3 5 7 6 4 8 5 7 6 4 2 4 5 7 11 next number
