{"", "a", -1},
	{"x", "a", -1},
	{"x", "x", 0},
	{"abc", "a", 0},
	{"abc", "b", 1},
	{"abc", "c", 2},
	{"abc", "x", -1},
	{"barfoobarfooyyyzzzyyyzzzyyyzzzyyyxxxzzzyyy", "x", 33},
	{"fofofofooofoboo", "oo", 7},
	{"fofofofofofoboo", "ob", 11},
	{"fofofofofofoboo", "boo", 12},
	{"fofofofofofoboo", "oboo", 11},
	{"fofofofofoooboo", "fooo", 8},
	{"fofofofofofoboo", "foboo", 10},
	{"fofofofofofoboo", "fofob", 8},

// The results of the following examples are given for 32-bit ints,
// which means the shifts will overflow.
var mm int = 1.0<<s            // 1.0 has type int; mm == 0
var oo = 1<<s == 2<<s          // 1 and 2 have type int; oo == true
var pp = 1<<s == 1<<33         // illegal: 1 has type int, but 1<<33 overflows int
var xx = a[1.0<<s]             // 1.0 has type int; xx == a[0]