b: 110
x: 105
i: 105
r: 105
t: 100
a: 100
k: 100
s: 100
e: 100
m: 95
z: 93
v: 93
h: 92
d: 92
f: 92
n: 91
y: 90
u: 85
w: 82
o: 82
p: 76
c: 74
g: 50
l: 30
q: 30
j: -12

Write a function which rates a string based on the Letter Score List. This should be achieved by evaluating each letter's individual value and averaging the score of all the letters in the string. Your function should always return with a number.

Example output:
```
> rateString("Ukraine")
< 98
> rateString("Russia")
< 99.16666666666667
```
Any language help asap pls