L = []
H,N = map(int,input().split())
for i in range(N-1) :
    h = int(input())
    L.append(h)
L = sorted(L)
L.reverse()
for j in range(N-1) :
    if H > L[i] :
        if i == 0 :
            print("1st")
            break
        elif i == 1 :
            print("2nd")
            break
        elif i == 2 :
            print("3rd")
            break
        else :
            print("{}th".format(i+1))
            break
    if L[N-2] > H :
        print("{}th".format(N))
        break