// test: echo -e '\n\n\n' | calc.exe -n
// test: echo -e '1.5\nsto (2)\n3 + rcl(2) * 4\nsto (5)' | calc.exe | grep -q 9
// test: echo -e '1\nsto (0)\nsto (11)\nrcl (0)\nrcl (11)' | calc.exe | grep -c invalid | xargs test 4 =
-// test: echo -e '1\nsto (2)\n3\nsto (5)\ndisp' | calc.exe | grep -q '0 1 0 0 3 0 0 0 0 0'
+// test: echo -e '1\nsto (2)\n3\nsto (5, 7)\nsto(9)\ndisp' | calc.exe | grep -q '0 1 0 0 7 0 0 0 7 0'
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