class Solution:
    def invalidTransactions(self, transactions: List[str]) -> List[str]:
        d = collections.defaultdict(list)
        for t in transactions:
            name, ti, am, city = t.split(",")
            d[name].append([int(ti),int(am),city,t])
        ans = []
        for n in d:
            for i in range(len(d[n])):
                if d[n][i][1] > 1000:
                    ans.append(d[n][i][3])
            for i in range(0,len(d[n])-1):
                for j in range(i+1, len(d[n])):
                    if d[n][i][2] != d[n][j][2] and abs(d[n][j][0] - d[n][i][0]) <= 60:
                        ans.append(d[n][j][3])
                        ans.append(d[n][i][3])
        return list(set(ans))