Nine persons are seated in a straight line. Three of them face south, and the remaining six face north. No more than two persons sitting next to each ...

Nine persons are seated in a straight line. Three of them face south, and the remaining six face north. No more than two persons sitting next to each other face the same direction. Six persons sit between H and P, and P is the only neighbor of R. G sits third to the right of W, who is second to the right of H. The number of persons to the right of G is less than those to the left of G. U and L sit immediately to the left of each other. O sits second to the right of L and faces the same direction as W. J sits to the right of O.

Four of the following five pairs are similar in a certain way and form a group. Which pair does not belong to that group?