C1111233131211111211113313331333133313331122212111111331333112323221   >>    C111123313121111121111331333133313331333112221211111133133311232322   <<    C1111233131211111211113313331333133313331122212111111331333112323223   >>      C1111233131211111211113313331333133313331122212111111331333112323222   >>