H,N=map(int,input().split())
L_H=[]
for i in range(N-1):
    L_H.append(int(input()))

L_H.sort(reverse=True)
postfix=["st","nd","rd"]
for i in range(len(L_H)):
    if L_H[i] < H:
        try:
            p=postfix[i]
        except IndexError:
            p="th"
        print(str(i+1)+p)
        exit()
print(str(i+2)+"th")