C1111233131211111211113313231333133313331323221211111333131121223213233311   >>    C111123313121111121111331323133313331333132322121111133313112122321323331   <<    C1111233131211111211113313231333133313331323221211111333131121223213233313   >>      C1111233131211111211113313231333133313331323221211111333131121223213233312   >>