#include
#include
void main()
{
int i,n;char str[21];
gets(str);n=strlen(str);
if(n==0) printf("error");
for(i=0;iif((str[i]<'a'||str[i]>'z')&&(str[i]<'A'||str[i]>'Z'))
printf("error");
else
{
for(i=0;i{
if((str[i]>='x'&&str[i]<='z')||(str[i]>='X'&&str[i]<='Z'))
str[i]-=22;
else str[i]+=4;
printf("%c",str[i]);
}
}
}
