C1111233131211111211113313331333131211111132233133313331323133313232211321   >>    C111123313121111121111331333133313121111113223313331333132313331323221132   <<    C1111233131211111211113313331333131211111132233133313331323133313232211323   >>      C1111233131211111211113313331333131211111132233133313331323133313232211322   >>