D12121111112223313223313132233132213231323132313131133132331231   >>    D1212111111222331322331313223313221323132313231313113313233123   <<    D12121111112223313223313132233132213231323132313131133132331233   >>      D12121111112223313223313132233132213231323132313131133132331232   >>