Let X denote the wing length in millimeters of a male gallinule and Y the wing length

Question:

Let X denote the wing length in millimeters of a male gallinule and Y the wing length in millimeters of a female gallinule. Assume that X is N(184.09,39.37) and Y is N(171.93,50.88) and that X and Y are independent. If a male and a female gallinule are captured, what is the probability that X is greater than Y?