1983B - Corner Twist - CodeForces Solution

for _ in range(int(input())):
    user = input().split()
    m,n = int(user[0]),int(user[1])
    l=[]
    temp=[]
    result = "YES"
    for i in range(2*m):
        inp = input()
        for j in inp:
            temp.append(int(j))
        l.append(temp)
        temp = []
    
    l_trans =[list(x) for x in zip(*l[:m])]
    l_trans1 =[list(x) for x in zip(*l[m:])]
    for i in range(m):
        if (sum(l[i])%3)!=(sum(l[m+i])%3):
            result = "NO"
            break
    for i in range(n):
        if (sum(l_trans[i])%3)!=(sum(l_trans1[i])%3):
            result = "NO"
            break
    print(result)