C1111233131211111211113313331333133313331312331333132213233113121   >>    C111123313121111121111331333133313331333131233133313221323311312   <<    C1111233131211111211113313331333133313331312331333132213233113123   >>      C1111233131211111211113313331333133313331312331333132213233113122   >>