cnt = 1;
while True:
if cnt % 1000000 == 0:
print "...", cnt;
for i in range(1,21):
if cnt % i != 0:
break;
if i == 20:
print "Ans >>", cnt;
sys.exit();
nx=20
for m in range(19,1,-1):
if nx % m != 0:
nnx=nx
nm = m
i = 2
while i < math.sqrt(nm):
if (nm % i) == 0 and (nnx % i) == 0:
[nm,nnx] = [x/i for x in [nm,nnx]]
continue
i+=1
nx *= nm
print nx