C1111233131211111211113313331323133313232212111112113313113313232131   >>    C111123313121111121111331333132313331323221211111211331311331323213   <<    C1111233131211111211113313331323133313232212111112113313113313232133   >>      C1111233131211111211113313331323133313232212111112113313113313232132   >>