static class FastScanner {
BufferedReader br;
StringTokenizer st;
FastScanner(){
br=new BufferedReader(new InputStreamReader(System.in));
st=new StringTokenizer("");
}
String next() {
while (!st.hasMoreTokens())
try {
st=new StringTokenizer(br.readLine());
} catch (IOException e) {}
return st.nextToken();
}
String nextLine(){
return br.nextLine();
}
String[] nextArray(){
return br.nextLine().split(" ");
}
int nextInt() {
return Integer.parseInt(next());
}
long nextLong() {
return Long.parseLong(next());
}
}
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