C1111233131211111211113313331333133313231121133131133132322132211   >>    C111123313121111121111331333133313331323112113313113313232213221   <<    C1111233131211111211113313331333133313231121133131133132322132213   >>      C1111233131211111211113313331333133313231121133131133132322132212   >>