$ @span .sh-var {-code}=@span .sh-ex {-`mkpass A-Z0-7`}
$ @span .sh-fn {-totp} $@span .sh-var {-code}
475867
$ @span .sh-fn {-echo} $@span .sh-var {-code} | @span .sh-fn {-totp}
475867
$ @span .sh-fn {-totp} -d 10 $@span .sh-var {-code}
0718732338