tab_headers (t, 1, 0, 1, 0);
tab_box (t, TAL_1, TAL_1, -1, -1, 0, 0, 2, n_encodings * n_unique_strings);
tab_hline (t, TAL_1, 0, 2, 1);
tab_headers (t, 1, 0, 1, 0);
tab_box (t, TAL_1, TAL_1, -1, -1, 0, 0, 2, n_encodings * n_unique_strings);
tab_hline (t, TAL_1, 0, 2, 1);