C1111233131211111211113313331323133313231323211331323133313113313232212131   >>    C111123313121111121111331333132313331323132321133132313331311331323221213   <<    C1111233131211111211113313331323133313231323211331323133313113313232212133   >>      C1111233131211111211113313331323133313231323211331323133313113313232212132   >>