maplow
*j++ = maplow(i) | k;
while (*e && w <= hyend && (*e & 0177) == maplow(cbits(*w))) {
if (w-1 == hyend || (w == wdend && maplow(cbits(*w)) == 's')) {
while (s > s0 && w >= wdstart && (*s & 0177) == maplow(cbits(*w))) {
switch (maplow(i)) {
i = t[maplow(a)-'a'][(j = maplow(b)-'a')/2];