#include<stdio.h>
#include<iostream>
#include<algorithm>
#include<math.h>
#include<string.h>
using namespace std;
int main()
{
char a[100],i,n,j,min1,b[100],c[100],carry=0;
int d[100];
cin>>a;
n=strlen(a);
for(i=0;i<n;i++)
{
for(j=i+1;j<n;j++)
{
if(a[i]<=a[j])
{
swap(a[i],a[j]);
}
}
}
min1=a[0];
for(i=0;i<n;i++)
{
b[i]=a[i];
if(a[i]<=min1&&a[i]!='0')
{
min1=min(a[i],min1);
swap(a[i],a[0]);
}
}
for(i=1;i<n;i++)
{
for(j=i+1;j<n;j++)
{
if(a[i]>=a[j])
swap(a[i],a[j]);
}
}
for(i=0;i<n;i++)
{
c[i]=a[i];
if(c[i]=='0')
c[i]=0;
else if(c[i]=='1')
c[i]=1;
else if(c[i]=='2')
c[i]=2;
else if(c[i]=='3')
c[i]=3;
else if(c[i]=='4')
c[i]=4;
else if(c[i]=='5')
c[i]=5;
else if(c[i]=='6')
c[i]=6;
else if(c[i]=='7')
c[i]=7;
else if(c[i]=='8')
c[i]=8;
else
c[i]=9;
if(b[i]=='0')
b[i]=0;
else if(b[i]=='1')
b[i]=1;
else if(b[i]=='2')
b[i]=2;
else if(b[i]=='3')
b[i]=3;
else if(b[i]=='4')
b[i]=4;
else if(b[i]=='5')
b[i]=5;
else if(b[i]=='6')
b[i]=6;
else if(b[i]=='7')
b[i]=7;
else if(b[i]=='8')
b[i]=8;
else
b[i]=9;
}
for(i=(n-1);i>=0;i--)
{
d[i]=c[i]+b[i]+carry;
if(d[i]>9)
{
carry=(d[i]-(d[i]%10))/10;
d[i]=d[i]%10;
}
else
carry=0;
}
if(carry>0)
cout<<1;
for(i=0;i<n;i++)
{
cout<<d[i];
}
}
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