letter   #center   avg center   #other   avg other
--------------------------------------------------
a                                           
b                                           
c                                    1       226.0
d                                           
e                                    1       226.0
f                                           
g                                           
h                                           
i                                           
j                                           
k                                           
l                                    1       226.0
m                                    1       226.0
n                                           
o                                    1       226.0
p                                    1       226.0
q                                           
r                                           
s                                           
t              1        226.0               
u                                           
v                                           
w                                           
x                                           
y                                           
z