return -1, err
		}
		if tmp.First == "" && tmp.Last == "" && tmp.EOS {
			return 0, errFileNotFound
		}
		if tmp.First >= search {
			o.debugln("First >= search", v)
			return i, nil
		}
		if tmp.Last >= search {
			o.debugln("Last >= search", v)
			return i, nil
		}
		if tmp.EOS {
			o.debugln("no match, at EOS", v)
			return -3, io.EOF
		}

          "jat?otamuk???nan&ak?n&ah?es???o&ay?n&a&ganihcawak?simuzi?tak??eba?ikibah?oyot??t&anim?iad?omamihs??uhc??ust&oimuzi?tes????ou&kuf!.&a&d&amay?eos??g&no?ok?usak??hiku?k&awayim?uzii??ma&kan?y&asih?im???rawak?t&a&gon?ka&h?num?t???umo??wa&g&a&kan?nay?t??ias??ko!rih???y&ihsa?usak???e&m&ay?uruk??taruk?us??i&a&nohs?raihcat??goruk?h&cukuf?s&a&gih?hukuy??in???k&a&gako?muzim??iust?o?ustani??m&anim?oti...