#include <stdio.h>
#include <string.h>
int main() {
char Risadas[60], Vogais[60];
int i=0, k=0;
scanf("%s", Risadas);
do{
if(Risadas[i]=='a'|| Risadas[i]=='e'|| Risadas[i]=='i'|| Risadas[i]=='o'|| Risadas[i]=='u'){
Vogais[k]=Risadas[i];
k++;
}
i++;
}while(Risadas[i] !='\0');
Vogais[k] = '\0';
char Invertida[60];
for(int j=0; j<k; j++){
Invertida[j] = Vogais[k-1-j];
}
Invertida[k] = '\0';
if(strcmp(Invertida, Vogais)==0){
printf("S");
}
else{
printf("N");
}
return 0;
}
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