C1313122132333132313132313232321323132313132322331323331323221221   >>    C131312213233313231313231323232132313231313232233132333132322122   <<    C1313122132333132313132313232321323132313132322331323331323221223   >>      C1313122132333132313132313232321323132313132322331323331323221222   >>