var n=parseInt(readline())
var arr1=readline()
var arr2=[]
var arr3=["N","E","S","W"]
var turnIndex=0
for(let i=0;i<n;i++){
    if(arr1[i]=="L"){
        turnIndex-=1
        if(turnIndex==-1){
            turnIndex=3
        }
    }else if(arr1[i]=="R"){
        turnIndex+=1
        if(turnIndex==4){
            turnIndex=0
        }
    }
}
print(arr3[turnIndex])