如何用python中的不同字符替换重复多次的字符串中的字符？

def replace_duplicates(string):
    result = ""
    i = 0
    while i < len(string):
        if i+2 < len(string) and string[i] == string[i+1] == string[i+2]:
            result += string[i]
            i += 3
        else:
            result += string[i]
            i += 1
    return result

string = "AAABBBCCCDDDEEE"
replaced_string = replace_duplicates(string)
print(replaced_string)

ABCDE