import sys
input = sys.stdin.read
sys.setrecursionlimit(300000)

visited = [False] * 300001
def dfs(u):
    visited[u] = True
    b = sorted(dfs(v) for v in adj[u] if not visited[v])
    return "methane" if not b else "".join("(" + x[:-3] + "yl)" for x in b) + "methane"

d = input().split()
N = int(d[0])
adj = [[] for _ in range(N + 1)]
index = 1
for i in range(1, N + 1):
    for _ in range(4):
        n = d[index]
        index += 1
        if n != 'H':
            n = int(n)
            if n != i:
                adj[i].append(n)
print(dfs(1))