#!/bin/bash
read a b
while [ $a != 0 && $b != 0 ]
do
a1=0
c=1
c1=1
while [ "$a1" -le $b ]
do
c1=`echo "($c1 * $a)" |bc`
a1=`echo "$a1+1"|bc`
done
echo "$c1/$a" |bc|sed -e ':a;N;$!ba;s/\n//g'|sed -e 's/\\//g'
read a b
done
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