"x" << "x" ----> none "x" << "X" ----> none "X" << "x" ----> "x" "xx" <<= "xx" ----> "xx" "xxx" <<= "xx" ----> none "xx" <<= "xxx" ----> "xxx" "x" >>= "x" ----> "x" "x" >>= "xx" ----> none "xx" >>= "x" ----> "x" "x" >> "x" ----> none "x" >> "X" ----> "X" "X" >> "x" ----> none "x" == "x" ----> "x" "x" == "X" ----> none "X" == "x" ----> none "x" ~== "x" ----> none "x" ~== "X" ----> "X" "X" ~== "x" ----> "x" Run-time error 103 at line 27 in expr15.icn string expected offending value: []