const main = ls => {
    const A = ls.splice(0,2);
    A.map((a,i)=>{
        switch (a) {
            case "N":
            A[i]=0;
                break;
            case "E":
            A[i]=1;
                break;
            case "S":
            A[i]=2;
                break;
            case "W":
            A[i]=3;
                break;
        }
    })
    if(A[1]-A[0]>=0){
        console.log(A[1]-A[0]);
    }else{
        console.log(4+(A[1]-A[0]));
    }    
}
 
main(require('fs').readFileSync('/dev/stdin', 'utf8').trim().split('\n'));