---
test case: "123"
in:
  str: "123"
out:
  str: "123"
---
test case: " 123"
in:
  str: " 123"
out:
  str: "123"
---
test case: "123 "
in:
  str: "123 "
out:
  str: "123"
---
test case: " 123 "
in:
  str: " 123 "
out:
  str: "123"
---
test case: "  123"
in:
  str: "  123"
out:
  str: "123"
---
test case: "123  "
in:
  str: "123  "
out:
  str: "123"
---
test case: "  123  "
in:
  str: "  123  "
out:
  str: "123"
---
test case: "\"123\""
in:
  str: "\"123\""
out:
  str: "123"
---
test case: " \"123\""
in:
  str: " \"123\""
out:
  str: "123"
---
test case: "\"123\" "
in:
  str: "\"123\" "
out:
  str: "123"
---
test case: " \"123\" "
in:
  str: " \"123\" "
out:
  str: "123"
---
test case: "  \"123\""
in:
  str: "  \"123\""
out:
  str: "123"
---
test case: "\"123\"  "
in:
  str: "\"123\"  "
out:
  str: "123"
---
test case: "  \"123\"  "
in:
  str: "  \"123\"  "
out:
  str: "123"
---
test case: ""
in:
  str: ""
out:
  str: ""
---
test case: "\""
in:
  str: "\""
out:
  str: "\""
---
test case: "\"\""
in:
  str: "\"\""
out:
  str: ""
---
test case: "\" \""
in:
  str: "\" \""
out:
  str: " "
---
test case: " \""
in:
  str: " \""
out:
  str: "\""
---
test case: " \"\""
in:
  str: " \"\""
out:
  str: ""
---
test case: " \" \""
in:
  str: " \" \""
out:
  str: " "
---
test case: "\" "
in:
  str: "\" "
out:
  str: "\""
---
test case: "\"\" "
in:
  str: "\"\" "
out:
  str: ""
---
test case: "\" \" "
in:
  str: "\" \" "
out:
  str: " "
---
test case: " \" "
in:
  str: " \" "
out:
  str: "\""
---
test case: " \"\" "
in:
  str: " \"\" "
out:
  str: ""
---
test case: " \" \" "
in:
  str: " \" \" "
out:
  str: " "
---
test case: "\"123 \""
in:
  str: "\"123 \""
out:
  str: "123 "
---
test case: "\" 123\""
in:
  str: "\" 123\""
out:
  str: " 123"
---
test case: "\" 123 \""
in:
  str: "\" 123 \""
out:
  str: " 123 "
---
test case: " \"123 \""
in:
  str: " \"123 \""
out:
  str: "123 "
---
test case: " \" 123\""
in:
  str: " \" 123\""
out:
  str: " 123"
---
test case: " \" 123 \""
in:
  str: " \" 123 \""
out:
  str: " 123 "
---
test case: "\"123 \" "
in:
  str: "\"123 \" "
out:
  str: "123 "
---
test case: "\" 123\" "
in:
  str: "\" 123\" "
out:
  str: " 123"
---
test case: "\" 123 \" "
in:
  str: "\" 123 \" "
out:
  str: " 123 "
---
test case: " \"123 \" "
in:
  str: " \"123 \" "
out:
  str: "123 "
---
test case: " \" 123\" "
in:
  str: " \" 123\" "
out:
  str: " 123"
---
test case: " \" 123 \" "
in:
  str: " \" 123 \" "
out:
  str: " 123 "
---
test case: "+"
in:
  str: "+"
out:
  str: ""
---
test case: "++"
in:
  str: "++"
out:
  str: "+"
---
test case: "+123"
in:
  str: "+123"
out:
  str: "123"
---
test case: "++123"
in:
  str: "++123"
out:
  str: "+123"
---
test case: "+\"123\""
in:
  str: "+\"123\""
out:
  str: "\"123\""
---
test case: " \"+123\" "
in:
  str: " \"+123\" "
out:
  str: "123"
---
test case: " \"+\" "
in:
  str: " \"+\" "
out:
  str: ""
---
test case: " \"+ \" "
in:
  str: " \"+ \" "
out:
  str: " "
---
test case: " \" +\" "
in:
  str: " \" +\" "
out:
  str: " +"
---
test case: " \" + \" "
in:
  str: " \" + \" "
out:
  str: " + "