D12121111111123313133313133313231131323132322331323132321221111   >>    D1212111111112331313331313331323113132313232233132313232122111   <<    D12121111111123313133313133313231131323132322331323132321221113   >>      D12121111111123313133313133313231131323132322331323132321221112   >>