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function strings()
{
var a = [], b = -1;
var s = "abcdefghij", s2 = "a";
var f = "f";
var c = 0, d = 0, e = 0, g = 0;
for (var i = 0; i < 10; i++) {
a[i] = (s.substring(i, i+1) + s[i] + String.fromCharCode(s2.charCodeAt(0) + i)).concat(i) + i;
if (s[i] == f)
c++;
if (s[i] != 'b')
d++;
if ("B" > s2)
g++; // f already used
if (s2 < "b")
e++;
b = s.length;
}
return a.toString() + b + c + d + e + g;
}
assertEq(strings(), "aaa00,bbb11,ccc22,ddd33,eee44,fff55,ggg66,hhh77,iii88,jjj991019100");