Collection A =new ArrayList();
A.add("a");
A.add("b");
A.add("a");
A.add("b");
A.add("c");
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public static void main(String[] args) {
Collection A =new ArrayList();
A.add("a");
A.add("b");
A.add("a");
A.add("b");
A.add("c");
Iterator iter=A.iterator();
int i=0;
int a=A.size();
String str;
while(iter.hasNext()){
i++;
str=iter.next().toString();
if(str=="a"){
a=i;
}
if(str=="b" && i>a){
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