def root(P, v):
    if P[v] < 0:
        return v
    P[v] = root(P, P[v])
    return P[v]


def unite(P, v, u, A):
    rv = root(P, v)
    ru = root(P, u)
    if rv == ru:
        return False
    if P[rv] > P[ru]:
        P[rv] = ru
        A[ru] = f"({A[rv][:-3]}yl){A[ru]}"
        A[rv] = ""
    else:
        if P[rv] == P[ru]:
            P[rv] -= 1
        P[ru] = rv
        A[rv] = f"({A[ru][:-3]}yl){A[rv]}"
        A[ru] = ""
    return True


N = int(input())
C = [[int(c)-1 for c in input().split() if c.isdigit()] for i in range(N)]
A = ["methane" for i in range(N)]
P = [-1 for i in range(N)]
for i in range(N):
    for j in C[i]:
        if i < j:
            unite(P, i, j, A)
print("".join(A))