C1111233131211111211113313331333132313231323223313331322212331323112121   >>    C111123313121111121111331333133313231323132322331333132221233132311212   <<    C1111233131211111211113313331333132313231323223313331322212331323112123   >>      C1111233131211111211113313331333132313231323223313331322212331323112122   >>