class Solution {
public String solution(int[] numLog) {
String answer = "";
String[] str = new String[numLog.length -1];
for(int i = 0; i < numLog.length -1; i++){
str[i] = "";
if(numLog[i+1] == numLog[i] + 1){
str[i] += 'w';
}else if(numLog[i + 1] == numLog[i] -1){
str[i] += 's';
}else if(numLog[i +1] == numLog[i] + 10){
str[i] += 'd';
}else if(numLog[i+1] == numLog[i] - 10){
str[i] += 'a';
}
}
for(int i = 0; i < numLog.length -1; i++){
answer += str[i];
}
return answer;
}
}