import sys
import pypyjit
pypyjit.set_param('max_unroll_recursion=-1')
sys.setrecursionlimit(10**6)
input = sys.stdin.readline
N = int(input())
C = [input().split() for _ in range(N)]
G = [[] for _ in range(N)]
for i in range(N):
    for c in C[i]:
        if c!="H":
            j = int(c)-1
            G[i].append(j)

def dfs(v, p):
    if v!=0:
        ans.append("(")
    for nv in G[v]:
        if nv==p:
            continue
        dfs(nv, v)
    if v==0:
        ans.append("methane")
    else:
        ans.append("methyl)")

ans = []
dfs(0, -1)
print("".join(ans))