Поляков 27 — 6а

a=open("27-6a.txt").readlines()
a=list(map(int,a))
n=len(a)
m=0
for i in range(0,n-1):
    for j in range(i+1,n):
        if (a[i]*a[j])%6==0:
            if a[i]*a[j]>m:    
                m=a[i]*a[j]
print(m)