#include

#include

int main$($void$)\{$

int ch;

while$(($ch $=$ getchar$())!=$ EOF$)\{$

if $($isprint$($ch$))\{$

putchar$($ch$)$;

$\}$ else $\{$

switch $($ch$)\{$

case $\text{'}\backslash$t$\text{'}$: printf$("\backslash \backslash$t$")$; break;

case $\text{'}\backslash$b$\text{'}$: printf$("\backslash \backslash$b$")$; break;

case $\text{'}\backslash$f$\text{'}$: printf$("\backslash \backslash$f$")$; break;

case $\text{'}\backslash 0\text{'}$: printf$("\backslash \backslash 0")$; break;

case $\text{'}\backslash \backslash \text{'}$: printf$("\backslash \backslash \backslash \backslash ")$; break;

case $\text{'}\backslash$v$\text{'}$: printf$("\backslash \backslash$v$")$; break;

case $\text{'}\backslash$r$\text{'}$: printf$("\backslash \backslash$r$")$; break;

case $\text{'}\backslash$a$\text{'}$: printf$("\backslash \backslash$a$")$; break;

case $\text{'}$

$\text{'}$: printf$("\backslash$

$")$; break;

default: printf$("\backslash \backslash \%02$x$",$ ch$)$; break;

$\}$

$\}$

$\}$

return$(0)$;

$\}$