package niceIO;

import java.lang.*;
import java.io.* ;

public class les {
  private static char EOF= ((char)(-1));

  public static final char tegn(InputStream in) {
    char c='0'; int ch=0; 
    try{ ch= in.read(); c= (char)ch; }
    catch(IOException e){}
    return c;
  }
  public static final char tegnNB(InputStream in) {
    char c='0'; int ch=0; 
    try{ ch= in.read(); c= (char)ch; 
    while (c==' ') {ch= in.read(); c=(char)ch;}
    }
    catch(IOException e){}
    return c;
  }

  public static final int htall(InputStream in) {
    int r=0, ch, s=0;
    try{ 
      ch= in.read()-48; 
      while (ch<0 || ch>9) {s=ch; ch= in.read()-48;}
      r= ch;
      ch= in.read()-48;
      while (ch >= 0 && ch <= 9) {r= (r*10)+ch; ch= in.read()-48; }
    }   catch(IOException e){}
    s= s+48;
    if ((char)s == '-') {r= -r;}
    return r;
  }     

  public static final boolean bool(InputStream in) {
    char c= tegn(in);
    if ( c=='n' || c=='N' || c=='0' || c=='-') return false;
    else return true;
  }

  /* read word - non-SPACE characters between SPACEs */
  public static final String ord(InputStream in) {
    char c= tegn(in); String s= new String("");
    while (Character.isSpace(c)) { c= tegn(in); }
    while (!Character.isSpace(c)) {s= s+c; c= tegn(in);}
    return s;
  }

  /* read word starting with a letter and containing only letters or digits */
  public static final String ordBS(InputStream in) {
    int ch, i; char c;
    StreamTokenizer pb= new StreamTokenizer(in);
    String s= new String("");
try{    i= pb.nextToken();
    while (i != pb.TT_WORD) i= pb.nextToken();
    s= pb.sval; }
    /*    try{
    ch= pb.read(); c= (char)ch; i=1;
    while (!Character.isLetter(c)) { ch= pb.read(); c=(char)ch; i= i+1;} 
    while (Character.isLetterOrDigit(c)) {s=s+c; pb.mark(1); ch=pb.read();c=(char)ch;i=i+1;}
    //    for (int k=1; k<i;k++) c=tegn(in);
    pb.reset();
    } */
    catch(IOException e){System.out.println("smth. wrong !!!");}
    return s;
  }

  /* above for reading from the terminal */

  public static final int htall()    { return htall(System.in); }
  public static final char tegn()    { return tegn(System.in); }
  public static final char tegnNB()  { return tegnNB(System.in); }
  public static final boolean bool() { return bool(System.in); }
  public static final String ord()   { return ord(System.in); }
  public static final String ordBS() { return ordBS(System.in); }
}