a=['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z']
end=len(a)
i=0
for i in range(i,16):
    print(a[i])
 
 
 sample output:
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
