C12313211232233312111111312111133133313331323133323232322211321   >>    C1231321123223331211111131211113313331333132313332323232221132   <<    C12313211232233312111111312111133133313331323133323232322211323   >>      C12313211232233312111111312111133133313331323133323232322211322   >>