C1111233131211111211113313231333133313331323221211111333132312311   >>    C111123313121111121111331323133313331333132322121111133313231231   <<    C1111233131211111211113313231333133313331323221211111333132312313   >>      C1111233131211111211113313231333133313331323221211111333132312312   >>