a=[list(map(int,input().split())) for i in range(8)]
y=0
for i in range(len(a)-1):
    for x in range(i+1, len(a)):
        if(a[i][1]==a[x][1] or a[i][0]==a[x][0]):
            y=1
        elif(a[i][1]-a[x][1]==a[i][0]-a[x][0]):
            y=1
if(y==0):
    print("NO")
else:
    print("YES")