哈囉大家好，我是又荒廢部落格好久的小編過路君子

#include<iostream>
#define UNI 5000 

using namespace std;

void filter(char x[UNI])
{
	char a[UNI];
	int b, c=0;
	
	for(int d=0;x[d]!='\0';d++)
	{
		b = (int) x[d];
		
		if(64<b && b<91) a[c] = (char) b, c++;
		else if(96<b && b<123)
		{
			b -= 32;
			a[c] = (char) b;
			c++;
		}
		else 
		{
			x[d] = '\0';
			continue;
		}
		
		x[d] = '\0';
	}
	
	for(int d=0;a[d]!='\0';d++) x[d] = a[d];
}

bool comparison(char x[UNI])
{
	char a[UNI];
	int b, e;
	
	for(b=0;;b++) if(x[b]=='\0') break;
	e = b;
	b--;
	
	for(int c=0;x[c]!='0';c++)
	{
		a[b] = x[c];
		b--;
	}
	
	for(b=0;x[b]!='\0';b++) if(a[b] != x[b]) break;
	if(e==b) return true;
	else return false;
}

int main(void)
{
	char a[UNI];
	bool b;
	
	while(cin >> a)
	{
		filter(a);
		b = comparison(a);
		
		if(b) cout << "yes\n";
		else cout << "no\n";
	}	
}