C3131313233313113313223313223313112113313233313223313231312323311   >>    C313131323331311331322331322331311211331323331322331323131232331   <<    C3131313233313113313223313223313112113313233313223313231312323313   >>      C3131313233313113313223313223313112113313233313223313231312323312   >>