AtCoder Beginner Contest 224

def main():
  s = input()
  print('er' if s[::-1][:2]=='re' else 'ist')

if __name__ == '__main__':
  main()

def main():
  h,w = map(int, input().split())
  a = [list(map(int, input().split())) for _ in range(h)]

  flg = True
  for i1 in range(h-1):
    for i2 in range(i1+1, h):
      for j1 in range(w-1):
        for j2 in range(j1+1, w):
          if a[i1][j1]+a[i2][j2] > a[i2][j1]+a[i1][j2]:
            flg = False
  print("Yes" if flg else "No")

if __name__ == '__main__':
  main()

def func(xs, ys):
  return abs((xs[0]-xs[2])*(ys[1]-ys[2]) - (xs[1]-xs[2])*(ys[0]-ys[2]))/2

def main():
  n = int(input())
  lst = [list(map(int, input().split())) for _ in range(n)]
  ans = 0
  for i in range(n):
    for j in range(i+1, n):
      for k in range(j+1, n):
          ret = func([lst[i][0], lst[j][0], lst[k][0]], [lst[i][1], lst[j][1], lst[k][1]])
          if ret!=0:
            ans += 1
  print(ans)

if __name__ == '__main__':
  main()

import sys
import heapq, math, itertools
from collections import defaultdict, deque
from bisect import bisect_left, bisect_right, insort_left, insort_right
inputs = sys.stdin.readline
mod = 10**9+7
inf = float('inf')
#sys.setrecursionlimit(10**7)

def to_str(lst):
  return ''.join(list(map(str, lst)))

def main():
  m = int(input())
  g = [[] for _ in range(10)]
  for _ in range(m):
    u,v = map(int, input().split())
    g[u].append(v)
    g[v].append(u)
  p = list(map(int, input().split()))
  pos = [0]+[9]*9
  for i,x in enumerate(p):
    pos[x] = i+1
  goal = [i for i in range(10)]
  used = set()
  que = deque([(pos, 0)])
  ans = inf
  while que:
    state, cnt = que.popleft()
    if state==goal:
      ans = min(ans, cnt)
    else:
      emp_idx = state.index(9)
      for nx in g[emp_idx]:
        nx_state = state[:]
        nx_state[emp_idx], nx_state[nx] = nx_state[nx], nx_state[emp_idx]
        txt = to_str(nx_state)
        if txt not in used:
          used.add(txt)
          que.append((nx_state, cnt+1))
  print(ans if ans!=inf else -1)

if __name__ == '__main__':
  main()