#include <iostream>
#include <cstdio>
using namespace std;

int main()
{
    char s1, s2;
    int b1, b2;
    scanf("%c%d %c%d",&s1, &b1, &s2, &b2);
    

    int sb1, sb2;
    switch(s1){
        case('a'): sb1=1; break;
        case('b'): sb1=2; break;
        case('c'): sb1=3; break;
        case('d'): sb1=4; break;
        case('e'): sb1=5; break;
        case('f'): sb1=6; break;
        case('g'): sb1=7; break;
        case('h'): sb1=8; break;
    }
        switch(s2){
        case('a'): sb2=1; break;
        case('b'): sb2=2; break;
        case('c'): sb2=3; break;
        case('d'): sb2=4; break;
        case('e'): sb2=5; break;
        case('f'): sb2=6; break;
        case('g'): sb2=7; break;
        case('h'): sb2=8; break;
    }
    // i je nas broj b1 i b2, j je sb1 i sb2, 
    bool uslov = (s1==s2)||(b1==b2);
    uslov = uslov || (b1-sb1==b2-sb2);
    uslov = uslov || ((sb1==8-b1)&&(sb2==8-b2)); 
    

    //bool uslov2 = (s1==s2)||(b1==b2) || (b1-sb1==b2-sb2) || ((sb1==8-b1)&&(sb2==8-b2));
    if(uslov) cout<<"da";
    else
       cout<<"ne";
    return 0;
}