C1111233131211111211113313331333133313133313331333132321223112321   >>    C111123313121111121111331333133313331313331333133313232122311232   <<    C1111233131211111211113313331333133313133313331333132321223112323   >>      C1111233131211111211113313331333133313133313331333132321223112322   >>