/* package whatever; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
{
String a
= "АбВгДеёжзийклмнопрстуфхцчшщъыьэюя\t\tаыппвыаи\r\nвыаиваыи ваы ивыи\nваиываиа ыва ивыи\nыва иа иваы ив"; System.
out.
println(a.
toLowerCase().
replaceAll("[^а-я]+",
"")); }
}
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