#include <iostream>
#include <sstream>
#include <string>

int main()
{
    std::istringstream stm( "a\tb\tc\nanother_line\n" ) ;
    std::string str ;
    std::getline( stm, str ) ;
    for( char c : str )
    {
        if ( c == '\t' ) std::cout << "<TAB>" ;
        else std::cout << c ;
    }
    std::cout << '\n' ;
}