#include<stdio.h>
#include<ctype.h>
#include<string.h>
int main()
{
    int diff=0;
    char a[100];
    char b[100];
    fgets(a,100,stdin);
    fgets(b,100,stdin);
    a[strcspn(a,"\n")]='\0';
    b[strcspn(b,"\n")]='\0';
    for(int i=0;a[i]!='\0';i++)
    {
        if((!isalpha((unsigned char)a[i]))&&(!isspace((unsigned char)a[i])))
        {
            printf("Invalid input");
            return 0;
        }
    }
    for(int i=0;b[i]!='\0';i++)
    {
        if((!isalpha((unsigned char)b[i]))&&(!isspace((unsigned char)b[i])))
        {
            printf("Invalid input");
            return 0;
        }
    }
    for(int i=0;a[i]!='\0';i++)
    {
        a=tolower((unsigned char)a);
    }
    for(int i=0;a[i]!='\0';i++)
    {
        b=tolower((unsigned char)b);
    }
    if(strcmp(a,b))==0)
    {
        printf("Yes");
    }
    else
    {
        printf("No");
    }
    return 0;
}