import std;

alias sread = () => readln.chomp();
alias lread = () => readln.chomp.to!long();
alias aryread(T = long) = () => readln.split.to!(T[]);
//aryread!string();
//auto PS = new Tuple!(long,string)[](M);
//x[]=1;でlong[]全要素1に初期化
void main()
{
    long h, w;
    scan(h, w);
    auto c = new string[][](h);
    foreach (i; 0 .. h)
    {
        c[i] = aryread!string();
    }
    // writeln(c);
    foreach (i; 0 .. h)
    {
        foreach (_; 0 .. 2)
        {
            foreach (j; 0 .. c[i].length)
            {
                write(c[i][j]);
            }
            writeln();
        }
    }
}

void scan(L...)(ref L A)
{
    auto l = readln.split;
    foreach (i, T; L)
    {
        A[i] = l[i].to!T;
    }
}

void arywrite(T)(T a)
{
    a.map!text.join(' ').writeln;
}
