C111123313331323113313331333133313331122112312111113331311331323132313231211   >>    C11112331333132311331333133313331333112211231211111333131133132313231323121   <<    C111123313331323113313331333133313331122112312111113331311331323132313231213   >>      C111123313331323113313331333133313331122112312111113331311331323132313231212   >>