C1111233131211111211113313331333133313231121133132322331123311211321   >>    C111123313121111121111331333133313331323112113313232233112331121132   <<    C1111233131211111211113313331333133313231121133132322331123311211323   >>      C1111233131211111211113313331333133313231121133132322331123311211322   >>