cset.py

L=[]
S=[]
with open("rosalind_cset.txt","rU") as f:
    for line in f:
        S.append(line.strip())
        L.append(int(line.strip(),2))
        
l=len(S[0])
def flip(x):
    return (~x)+(1<<(l))
    

def check(x,y):   
    if x&flip(y)!=0 and x&y!=0 and flip(x)&y!=0 and flip(x)&flip(y)!=0:
        return False
    else:
        return True

jsave=0

for i,x in enumerate(L):
    j=0
    for k,y in enumerate(L):
        if not check(x,y):
            j+=1
 
    if j>jsave:
        bad=i
        jsave=j
        
for i,x in enumerate(S):
    if i!=bad:
        print x