its hard time today Petya need score 100 point informatic exam the task easy Petya think lack time finish ask help onethere glob pattern statement string consist lowercase english letter character it know character occur patternalso n query string give require determine pattern match noteverything easy Petya discover special pattern character differ usual meaningA pattern match stre possible replace character good lowercase english letter character include stre bad lowercase english letter result string give stringThe good letter give Petya all bad