module.exports = class School {
constructor(){
  this.grades = {}
}
roster(){
  return this.grades
}
add(name, grade){
  if(this.grades[grade]){
    this.grades[grade].push(name)
    this.grades[grade].sort()
  } else {
    this.grades[grade] = [name]
  }
}
grade(grade){
  return this.grades[grade]? this.grades[grade].sort() : []
}

}

/*school.add('Blair',2)
school.add('James',2)
school.add('Paul',2)
//let expectedDb = { 2 : [ 'Blair', 'James', 'Paul' ] }
console.log(school.roster())*/

@@ -91,16 +91,17 @@
 s.grades
+;
 %0A%7D%0Aadd(n
@@ -118,16 +118,17 @@
 )%7B%0A  if(
+!
 this.gra
@@ -166,19 +166,26 @@
 ade%5D
-.push(name)
+ = %5Bname%5D%0A  %7Delse%7B
 %0A   
@@ -208,25 +208,18 @@
 de%5D.
-sort()%0A  %7D else %7B
+push(name)
 %0A   
@@ -233,33 +233,31 @@
 rades%5Bgrade%5D
- = %5Bname%5D
+.sort()
 %0A  %7D%0A%7D%0Agrade
@@ -261,232 +261,198 @@
 ade(
-grade)%7B%0A  return this.grades%5Bgrade%5D? this.grades%5Bgrade%5D
+number)%7B%0A  const result = Object.keys(this.grades).filter(x =%3E x== number).map(x =%3E this.grades%5Bx%5D)%0A  const verific = (x=%3E x? x
 .sort()
- 
 : %5B%5D
-%0A%7D%0A%0A%7D%0A%0A/*school.add('Blair',2)%0Aschool.add('James',2)%0Aschool.add('Paul',2)%0A//let expectedDb = %7B 2 : %5B 'Blair', 'James', 'Paul' %5D %7D%0Aconsole.log(school.roster())*/
+)%0A  let resp = verific(result%5B0%5D);%0A  return resp;%0A%7D%0A%0A%0A%7D
 %0A

Update grade-school.js