D12121111112223313223313133313112132313231333131333131323211211   >>    D1212111111222331322331313331311213231323133313133313132321121   <<    D12121111112223313223313133313112132313231333131333131323211213   >>      D12121111112223313223313133313112132313231333131333131323211212   >>