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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
short MIN_K, *P;
void putnc(char *s, short len)
{
short i;
for (i = 0; i < len; i++)
putchar(s[i]);
putchar(10);
}
char palin(char *s, short len)
{
short i;
for (i = 0; i < (len + 1) / 2; i++)
if (s[i] != s[len - i - 1])
return 0;
return 1;
}
void foo(char *s, short len, short k, short *p)
{
short i, j;
if (palin(s, len)) {
MIN_K = k;
memcpy(P, p, k * sizeof(short));
return;
}
if (k >= MIN_K)
return;
for (i = len - 1; i; i--)
if (palin(s, i)) {
p[k] = p[k - 1] + i;
foo(s + i, len - i, k + 1, p);
}
}
int main()
{
short n, i, *p;
char *s;
scanf("%hd\n", &n);
s = malloc(n + 1);
fgets(s, n + 1, stdin);
MIN_K = n;
P = malloc(n);
p = malloc(n);
p[0] = 0;
foo(s, n, 1, p);
printf("%hd\n", MIN_K);
for (i = 1; i < MIN_K; i++)
putnc(s + P[i - 1], P[i] - P[i - 1]);
puts(s + P[MIN_K - 1]);
return 0;
}
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