public void smile67KataTest_withoutRandom4()
 {
     Assert.AreEqual("abcDEfgDEFGg", PlayWithTwoStrings.WorkOnStrings("abcdeFg", "defgG"));
 }
 public void smile67KataTest_withoutRandom2()
 {
     Assert.AreEqual("ABABbababa", PlayWithTwoStrings.WorkOnStrings("abab", "bababa"));
 }
 public void smile67KataTest_withoutRandom3()
 {
     Assert.AreEqual("abcDeFGtrzWDEFGgGFhjkWqE", PlayWithTwoStrings.WorkOnStrings("abcdeFgtrzw", "defgGgfhjkwqe"));
 }
 public void smile67KataTest_withoutRandom1()
 {
     Assert.AreEqual("abCCde", PlayWithTwoStrings.WorkOnStrings("abc", "cde"));
 }