str="abcdefghijklmnopqrstuvwxyz"
while 0
    rnd=rand(26)
    ch=str[rnd]
    fileName=ch+"2.txt"
    puts fileName

    fl = File.open(fileName)
    lineCnt=fl.lines.count
    fl.close

    fl=File.open(fileName)
    (1..5).each do |cnt|
        rnd=rand(lineCnt-1)
        puts rnd
    end
    fl.close

    puts "Do you want to continue(Type 1 or 2)"
    puts "1)Yes"
    puts "2)No"

    inp=gets.chomp
    if inp=="NO"||inp=="No"||inp=="N"||inp=="n"||inp=="2"
        break
    end
end