Why c instead of a?

Question

Hi , my problem is that my code encripts the
letters z and y with c and d instead a and b
This is the code:
g=['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']
k=['h','o','l','y']
f=0
while f<len(k):
try:
p=g.index(k[f])
u=p+2
k.remove(k[f])
k.insert(f,g[u])
f=f+1
except:
c=p-24
print(g[c])
k.insert(f,g[c])
print(k)

Any idea of why it happens?

Answer 1

while f<len(k):
try:
p=g.index(k[f])
u=p+2
k.remove(k[f])
k.insert(f,g[u])

except:
c=p-24
print(g[c])
k.insert(f,g[c])
f += 1
print(k)

f = f + 1 should be outsider try except.

Answer 2

Ahh so that was the problem,thanks for answering!