C1111233131211111211113313331333132313231323223313331323133112121   >>    C111123313121111121111331333133313231323132322331333132313311212   <<    C1111233131211111211113313331333132313231323223313331323133112123   >>      C1111233131211111211113313331333132313231323223313331323133112122   >>