C1111233131211111211113313231333133313331323221211111333133323321   >>    C111123313121111121111331323133313331333132322121111133313332332   <<    C1111233131211111211113313231333133313331323221211111333133323323   >>      C1111233131211111211113313231333133313331323221211111333133323322   >>