import sys
import datetime

sys.setrecursionlimit(10 ** 6)
int1 = lambda x: int(x) - 1
p2D = lambda x: print(*x, sep="\n")
def MI(): return map(int, sys.stdin.readline().split())
def MI1(): return map(int1, sys.stdin.readline().split())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]

def main():
    start=int(input())
    m=int(input())
    cup=[False]*3
    cup[start-1]=True
    for _ in range(m):
        p,q=MI1()
        cup[p],cup[q]=cup[q],cup[p]
    for i in range(3):
        if cup[i]:
            print(i+1)
            break
main()