C31313132333131133132233132233132213233313231323133213231311211   >>    C3131313233313113313223313223313221323331323132313321323131121   <<    C31313132333131133132233132233132213233313231323133213231311213   >>      C31313132333131133132233132233132213233313231323133213231311212   >>