(function main() {
           // var str = readline();
           var str = ["R","L","L"];
           var count = 0;
           var len = str.length;
           for (var i = 0; i < len; i++) {
               if (count == 0 && str[i] == 'L') {
                   count = 3;
               } else if (count == 3 && str[i] == "R") {
                   count = 0;
               } else if (str[i] == "L") {
                   count--;
               } else if (str[i] == "R") {
                   count++;
               }
           }
           var res;
           switch (count) {
               case 0: res = "N"; break;
               case 1: res = "E"; break;
               case 2: res = "S"; break;
               case 3: res = "W"; break;
           }
           // print(res);
           console.log(res);
       })();