Looping on each line and each position in python

I’m stuck in a small looping problem.
I have a file with different positions.
p = [10, 11, 16]
I have a input (have 5 line for example) file like this:
s= BCCDDDCDCCDDDDDDABCDABCABDBACBDCAACCBBCABACBCCABCACBCDCCCBDBACDCBBCBCBCCCACADAACCABABADBCBAABBBCCBB
BCCDDDCDCDDDDCDDABCDABCABDBACBDDAACDBBCABACBCDBBCACBCCCCCBDBACDBBBCBCBACBACACAACCCBABADBCBAABBBCCBB
BCCDDDCDCDDDDCCDABCDABCABDBACBDDAADDBBCABACBCDBBCACBCCCCCBDBACDBBBCBCBACCACADAACCBBABADBCCACBBBCCBB
BCCDDDCDCCDDDCCDABCDABCDBDBACBDCAADDCBCABACBCCABCACBCDCCCBDBACDBBBCBCBBCCACADAACCBBABADBCCAAABBCCBB
BCCDDDCDCDDDDCCDABCDABCABDBACBDCAADDCBCABACBCCABCACBCCCCCBDBACDDBBCBCBACCACADAACCCBABADBCCAAABBCCBB

Now I like to make a loop in python which will print only those positions given in ‘p’ from each line in ‘s’
The desired output will be:
DDA
DDA
DDA
DDA
DDA

Now, this is my code:

p=np.loadtxt('positions')
s=np.loadtxt('s')
for i in range (0, len(s)): 
    for i in p:  
        print(line [int(i)], end='')

output is : DDADDADDADDADDA
How do I convert this output to

DDA
DDA
DDA
DDA
DDA

>Solution :

you can try this:

p=np.loadtxt('positions')
s=np.loadtxt('s')
for i in range (0, len(s)): 
    for i in p:  
        print(line [int(i)], end='')
    print()

this way you add a linebreak at the end of the outer for-loop