C1111233131211111211113313331333132313231323223313331322331322112121   >>    C111123313121111121111331333133313231323132322331333132233132211212   <<    C1111233131211111211113313331333132313231323223313331322331322112123   >>      C1111233131211111211113313331333132313231323223313331322331322112122   >>