### equationsPossible 
from typing import *
def f_gold(equations: List[str]) -> bool:
    def find(x):
        if p[x] != x:
            p[x] = find(p[x])
        return p[x]
    p = list(range(26))
    for e in equations:
        a, b = ord(e[0]) - ord('a'), ord(e[-1]) - ord('a')
        if e[1] == '=':
            p[find(a)] = find(b)
    for e in equations:
        a, b = ord(e[0]) - ord('a'), ord(e[-1]) - ord('a')
        if e[1] == '!' and find(a) == find(b):
            return False
    return True