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

Hi.append(H)

Hi.sort(reverse=True)
tmp=[]
for i in enumerate(Hi):
    if i[1]==H:
        num=i[0]+1
        break

if str(num)[-1]=='1':
    print(str(num)+'st')
elif str(num)[-1]=='2':
    print(str(num)+'nd')
elif str(num)[-1]=='3':
    print(str(num)+'rd')
else:
    print(str(num)+'th')