#include <iostream>

int main()
{
    auto str = R"(
    0123456789abcdefghijklm
        0123456789abcdefghijklm
            0123456789abcdefghijklm
                0123456789abcdefghijklm
                    0123456789abcdefghijklm
                        0123456789abcdefghijklm
                    0123456789abcdefghijklm
                0123456789abcdefghijklm
            0123456789abcdefghijklm
        0123456789abcdefghijklm
    0123456789abcdefghijklm
)";
    std::cout << str;
}