C1111233131211111211113313331323133313231333133312111113331323232223311   >>    C111123313121111121111331333132313331323133313331211111333132323222331   <<    C1111233131211111211113313331323133313231333133312111113331323232223313   >>      C1111233131211111211113313331323133313231333133312111113331323232223312   >>