h,n=map(int,input().split())
a=[int(input()) for _ in range(n-1)]
num=[[h,0]]
for i in range(n-1):
    num.append([a[i],1])
num.sort(key=lambda x: x[0],reverse=True)
for i in range(n):
    if num[i][1]==1:
        ans=str(i+1)
        break
if ans[-1]=="1":
    print(ans+"st")
elif ans[-1]=="2":
    print(ans+"nd")
elif ans[-1]=="3":
    print(ans+"rd")
else:
    print(ans+"th")