C1111233131211111211113313231333133313331323221211111121133132323321323111   >>    C111123313121111121111331323133313331333132322121111112113313232332132311   <<    C1111233131211111211113313231333133313331323221211111121133132323321323113   >>      C1111233131211111211113313231333133313331323221211111121133132323321323112   >>