# coding: utf-8
def II(): return int(input())
def ILI(): return list(map(int, input().split()))


def read():
    N, M = ILI()
    A_B = [ILI() for __ in range(M)]
    return N, M, A_B


def solve(N, M, A_B):
    n_boss = list(range(N + 1))
    d_team = dict()
    for i in range(1, N + 1):
        d_team[i] = {i}

    for a, b in A_B:
        a_boss = n_boss[a]
        b_boss = n_boss[b]
        a_team_num = len(d_team[a_boss])
        b_team_num = len(d_team[b_boss])
        if a_boss == b_boss:
            continue
        else:
            if a_team_num == b_team_num:
                if a_boss <= b_boss:
                    d_team[a_boss] = d_team[a_boss] | d_team[b_boss]
                    for ele in d_team[b_boss]:
                        n_boss[ele] = a_boss
                    d_team[b_boss] = None
                else:
                    d_team[b_boss] = d_team[a_boss] | d_team[b_boss]
                    for ele in d_team[a_boss]:
                        n_boss[ele] = b_boss
                    d_team[a_boss] = None
            elif a_team_num > b_team_num:
                d_team[a_boss] = d_team[a_boss] | d_team[b_boss]
                for ele in d_team[b_boss]:
                    n_boss[ele] = a_boss
                d_team[b_boss] = None
            else:
                d_team[b_boss] = d_team[a_boss] | d_team[b_boss]
                for ele in d_team[a_boss]:
                    n_boss[ele] = b_boss
                d_team[a_boss] = None

    ans = "\n".join(map(str, n_boss[1:]))
    return ans


def main():
    params = read()
    print(solve(*params))


if __name__ == "__main__":
    main()