import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)
INF = float("INF")
MOD = 10 ** 9 + 7
MOD2 = 998244353
from heapq import heappop, heappush
import math
from collections import Counter, deque
from itertools import accumulate, combinations, combinations_with_replacement, permutations
from bisect import bisect_left, bisect_right
import decimal

n = int(input())
s = list(map(lambda x : ord(x) - ord("a"), list(input().rstrip())))
trns = [chr(25 - i + ord("a")) for i in range(26)]
ans = []
for i in range(n):
    ans.append(trns[s[i]])

print("".join(ans))