#include<cstdio>


void swap(char& a, char& b)
{
	char c;
	c=a;
	a=b;
	b=c;
}


int main(void)
{
	char n[9+2];
	int i, max_n, max_i, s;

	while(scanf("%[0-9]%*[\n]", n)==1)
	{
		for(s=0;n[s];s++)
		{
			max_i=s;
			max_n=n[max_i];
			for(i=s+1;n[i];i++)
			{
				if(max_n<=n[i])
				{
					max_n=n[i];
					max_i=i;
				}
			}

			for(i=0;i<max_i;i++)
			{
				if(n[i]<max_n)
				{
					swap(n[i], n[max_i]);
					break;
				}
			}
			if(i<max_i) break;
		}
		printf("%s\n", n);
	}

	return 0;
}