from sys import stdin,setrecursionlimit#,set_int_max_str_digits
#import pypyjit
#pypyjit.set_param('max_unroll_recursion=-1')
setrecursionlimit(20000000) # これこどふぉだと無理
#set_int_max_str_digits(200010)

mod = 998244353  
ii = lambda :int(stdin.readline())
mi = lambda :map(int,stdin.readline().split())
li = lambda :list(mi())
gmi = lambda :map(lambda x: int(x) - 1, stdin.readline().split())
gi = lambda :list(map(lambda x: 0 if x == "." else 1,input())) # グリッド入力受け取り
py = lambda :print("Yes")
pn = lambda :print("No")
pf = lambda :print("First") 
ps = lambda :print("Second")
vec = [(1,0),(-1,0),(0,-1),(0,1)]
vec1 = [(1,0),(1,1),(0,1),(-1,1),(-1,0),(-1,-1),(0,-1),(1,-1)] #8方向
inf = 10**18

n = ii() 
from collections import defaultdict 

data = [li() for _ in range(n)] 

cnt = defaultdict(int) 
g = defaultdict(list) 

for i in range(n):
    a,b,c = data[i]
    cnt[a,b] += 1 
    cnt[b,c] += 1 
    cnt[a,c] += 1 
    g[a,b].append(i)
    g[b,c].append(i) 
    g[a,c].append(i) 

for i in cnt:
    if cnt[i] > 2:
        print("NO")
        exit() 


muki = defaultdict(int) 
seen = [0]*n 

for i in range(n):
    if seen[i]:continue 
    seen[i] = 1 

    st = [i]
    while st:
        v = st.pop() 
        a,b,c = data[v] 

        flag = 0
        if (a,b) in muki:
            flag = muki[a,b] 
        if (b,c) in muki:
            if flag and flag != muki[b,c]:
                print("NO")
                exit()
            flag = muki[b,c]

        if (a,c) in muki:
            if flag and flag != -muki[a,c]:
                print("NO")
                exit()
            flag = -muki[a,c]

        if flag == 0:
            flag = 1 

        muki[a,b] = flag 
        muki[b,c] = flag
        muki[a,c] = -flag

        for u in g[a,b]:
            if seen[u] == 0:
                st.append(u) 
                seen[u] = 1 

        for u in g[b,c]:
            if seen[u] == 0:
                st.append(u) 
                seen[u] = 1 

        for u in g[a,c]:
            if seen[u] == 0:
                st.append(u) 
                seen[u] = 1 


for v in range(n):
    a,b,c = data[v] 

    if muki[a,b] == muki[b,c] == -muki[a,c]:
        continue 
    print("NO")


print("YES")