+ import std.math;
  import std.typecons;
- import std.math;
  /*
  Task
-     We are given two strings s and c, you have to deleted all the characters in s that are equal to any character in c
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+ We are given two strings s and c, you have to deleted all the characters in s that are equal to any character in c
-     then check if the result string is palindrome.
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+ then check if the result string is palindrome.
-     A string is called palindrome if it reads the same backward as forward.
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+ A string is called palindrome if it reads the same backward as forward.
-     You should return a tuple containing the result string and true/false for the check.
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+ You should return a tuple containing the result string and true/false for the check.
-     Example
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+ Example
-     >>> reverse_delete("abcde", "ae")
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+ >>> reverse_delete("abcde", "ae")
-     tuple("bcd", false)
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+ tuple("bcd", false)
-     >>> reverse_delete("abcdef", "b")
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+ >>> reverse_delete("abcdef", "b")
-     tuple("acdef", false)
? ----

+ tuple("acdef", false)
-     >>> reverse_delete("abcdedcba", "ab")
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+ >>> reverse_delete("abcdedcba", "ab")
-     tuple("cdedc", true)
? ----

+ tuple("cdedc", true)
-     
  */
  Tuple!(string, bool) reverse_delete(string s, string c)