def matrix(a):
    x = 0
    n=len(a)
    m=len(a[x])
    fl=0
    # compare rows
    for x in range(n-1):
        for a1,a2 in [(a[x][i],a[x][i+1]) for i in range(m-1)]:
            if a1==a2:
                fl+=1
            if fl==3:
                return True
        fl=0 
     # compare cols   
    for x in range(n-1):
        for a1,a2 in [(a[i][x],a[i+1][x]) for i in range(m-1)]:
            if a1==a2:
                fl+=1
            if fl==3:
                return True
        fl=0 
    #compare general diag
    for x in range(n-1):
        for a1,a2 in [(a[i][i],a[i+1][i+1]) for i in range(m-1)]:
            if a1==a2:
                fl+=1
            if fl==3:
                return True
        break
        fl=0 
return False
if __name__ == '__main__':
    assert matrix([[7, 1, 1, 8, 1, 1],
    [1, 1, 7, 3, 1, 5],
    [2, 3, 1, 2, 5, 1],
    [1, 1, 1, 5, 1, 4],
    [4, 6, 5, 1, 3, 1],
    [1, 1, 9, 1, 2, 1]
    ])==True