Triangles QRS and WXY are given.

One triangle has the following marked: Angle S has an arc with one hash mark, angle R has an arc with two hash marks, and angle Q has an arc with three hash marks. Q R has one hash mark, R S has two hash marks, and Q S has three hash marks. The other triangle has the following marked: Angle Y has an arc with one hash mark, angle X has an arc with two hash marks, and angle W has an arc with three hash marks. W X has one hash mark, X Y has two hash marks, and W Y has three hash marks.

Which side is congruent to side Q R?

side R S
side X Y
side W Y
side W X