#include <stdio.h>
#define NMax 100

/* Function Prototypes */
int 	AllanRead(int n, int CharArray[]);
void 	AllanSort(int n, int CharArray[]);
int 	AllanDump(int n, int CharArray[]);

main()
{ 
int ActualSize;
int CharArray[NMax];

ActualSize=AllanRead(NMax,CharArray);
AllanSort(ActualSize,CharArray);
AllanDump(ActualSize,CharArray);
}

/* AllanRead: 
Reads up to n characters from stdin to CharArray and 
returns the number of items read. */

int 	AllanRead(int n, int CharArray[])
{
int a, i=0;
a=getchar();
while(a!=EOF && i<n){
	CharArray[i]=a;
	i++;
	a=getchar();
	};
return i;
}

/* AllanSort:
Sorts the n entries of CharArray using BubbleSort */

void 	AllanSort(int n, int CharArray[])
{
int a,b,i,swap=1;  
while(swap==1){
	swap=0;
	for(i=0;i<n-1;i++){
		a=CharArray[i];
		b=CharArray[i+1];
		if(a>b){swap=1; 
			CharArray[i]=b; 
			CharArray[i+1]=a;
			};
		};
	};
}
	
/* AllanDump 
Dumps a formatted version of the n integers in
CharArray to standard out */

int 	AllanDump(int n, int CharArray[])
{
int i;
for(i=0;i<n;i++){
	printf("%c",CharArray[i]); 
	};
printf("\n");
return 1;
}