C23131111222331311211331323111133132233132313331323331323133313331322233231221   >>    C2313111122233131121133132311113313223313231333132333132313331333132223323122   <<    C23131111222331311211331323111133132233132313331323331323133313331322233231223   >>      C23131111222331311211331323111133132233132313331323331323133313331322233231222   >>