C11112331312111112111133132313331323331323223313231333132212321   >>    C1111233131211111211113313231333132333132322331323133313221232   <<    C11112331312111112111133132313331323331323223313231333132212323   >>      C11112331312111112111133132313331323331323223313231333132212322   >>