C31313132333131133132233132233131121133132333131333132313311231211   >>    C3131313233313113313223313223313112113313233313133313231331123121   <<    C31313132333131133132233132233131121133132333131333132313311231213   >>      C31313132333131133132233132233131121133132333131333132313311231212   >>