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void main()
{
import std.ascii : isWhite;
import std.stdio, std.algorithm;
string s = " abc";
assert(findSkip!isWhite(s) && s == "abc");
assert(!findSkip!isWhite(s) && s == "abc");
s = " ";
writeln(findSkip!isWhite(s)); // 2
import std.stdio;
s = " ";
findSkip!isWhite(s).writeln;
}