, 1, 1, ""
"", 1, 1, ""
"QWERTYUIOP", -1, 1, "#VALUE!"
"QWERTYUIOP", 5, -1, "#VALUE!"
"QWERTYUIOP", 5, ""
"QWERTYUIOP", 8, 20, "IOP"
"ABCDEFGHI", 4, 3, "DEF"
TRUE, 2, 1, "R"
FALSE, 2, 2, "AL"