function question() {
    echo -e "\e[37;42m\e[K        \e[1m$*\e[0m" >&2
}
function hint() {
    echo -e "\e[34m        \e[1m$*\e[0m" >&2
}

function info() {
    echo -e "\e[32m[info]  \e[1m$*\e[0m" >&2
}
function debug() {
    echo -e "\e[34m[debug] \e[1m$*\e[0m" >&2
}
function error() {
    echo -e "\e[31m[error] \e[1m$*\e[0m" >&2
}
function exec() {
    echo -e "\e[32;1m \$ \e[32m$@\e[0m" >&2
    $@
}