def split_string(string):
    list_string = string.split(':')
    return list_string

def join_string(list_string):

    string = '\n'.join(list_string)
    return string

if __name__=="__main__":
    f = open(r"D:\Users\abc.txt")
    if f.mode=="r":
        data=f.read()

    list_string=split_string(data)
    new_string=join_string(list_string)
    print(new_string)