C1111233131211111211113313331333133313331312211113313231333122321   >>    C111123313121111121111331333133313331333131221111331323133312232   <<    C1111233131211111211113313331333133313331312211113313231333122323   >>      C1111233131211111211113313331333133313331312211113313231333122322   >>