pallin

def ispal(number):
        digits = str(number)
        return digits == digits[::-1]
a=99
largest = 0
ap = 0
bp = 0
cp = 0
dp = 0
while a > 9:
        b=a
        while b>9:
                c=b
                while c>9:
                        d=c
                        while d>9:
                                pal = a*b*c*d
                                if pal > largest:
                                        if ispal(pal):
                                                largest = pal
                                                ap = a
                                                bp = b
                                                cp = c
                                                dp = d
                                                break
                                d-=1
                        c-=1
                        if a*a*b*c<largest+1:
                                break
                b-=1
                if a**3*b<(largest)+1:
                        break
        a-=1
        if a < (largest**0.25 +1):
                break
print largest
print ap
print bp
print cp
print dp