import sys
sys.setrecursionlimit(10 ** 8)
from collections import deque
n=int(input())
if n==1:
    print("methane")
    exit()
R=[[] for _ in range(n+1)]
for i in range(1,n+1):
    A=input().split()
    for j in A:
        if j!="H":
            R[i].append(int(j))
            R[int(j)].append(i)
for i in range(n+1):
    R[i]=list(set(R[i]))
F=[0]*(n+1)
def dfs(x):
    que=deque()
    que.append("methyl")
    F[x]=1
    for i in R[x]:
        if F[i]==0:
            que.append(")")
            que.extend(dfs(i))
            que.append("(")
    return que
ans=list(dfs(1))
ans=ans[::-1]
ans.pop()
ans.append("methane")
print("".join(ans))