C1111233131211111211113313331323133313231333133313232233313123231   >>    C111123313121111121111331333132313331323133313331323223331312323   <<    C1111233131211111211113313331323133313231333133313232233313123233   >>      C1111233131211111211113313331323133313231333133313232233313123232   >>