CHET_MT
ch->firsts[CHET_MT] =
ch->counts[CHET_MT] =
ch->firsts[CHET_MT],
ch->counts[CHET_MT]);
trans = ch->firsts[CHET_MT];
trans = ch->firsts[CHET_MT];
trans = ch->firsts[CHET_MT];
params.cp_npickers = ch->counts[CHET_MT];