Python list index out of range hatası

       ArrayList<String> list = new ArrayList<>();
              String girdi = "deneme";
              for(int i = girdi.length(); i>0; i--){
                  
                list.add(girdi.substring(i-1,i));
              }
         System.out.println(list);

var = input("mirror:")
mirror = []
index = 0
while True:
    mirror.append(var[len(var) - 1 - index])
    index += 1
    if index >= len(var):
        print(mirror)
        break

word = "hello, world"
reversed = ""
for i in range(len(word)-1,-1,-1):
  reversed += word[i]
print(reversed)