Problem:
Score : 200 points

Problem Statement

Given is a string S. Replace every character in S with x and print the result.

Constraints

S is a string consisting of lowercase English letters.

The length of S is between 1 and 100 (inclusive).

Input

Input is given from Standard Input in the following format:

S

Output

Replace every character in S with x and print the result.

Sample Input 1

sardine

Sample Output 1

xxxxxxx

Replacing every character in S with x results in xxxxxxx.

Sample Input 2

xxxx

Sample Output 2

xxxx

Sample Input 3

gone

Sample Output 3

xxxx

Solution in Fortran (gfortran v4.8.4) (judge verdict: Wrong Answer)

program main
  implicit none

  character,allocatable :: a(:)
  character(:),allocatable :: b
  integer :: nb, i
  character(100) :: c

  read( *, '(A6)' )  c
  b=trim(c)
  nb = len(b)   ! 文字列の長さ                                                                             

  allocate(a(nb))             ! 文字の配列を割り付け                                                       
  do i=1,nb
     a(i)='x'
  enddo

  b = transfer(a(1:nb),b)  ! 逆順に参照した文字の配列を文字列に戻す                                        


  print *, b

end program