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def IsStrNice (strFunc):
arrFunc = set(list(strFunc))
strChar = strFunc[0]
return strChar.upper() in arrFunc and strChar.lower() in arrFunc
## strInput = "YaaAho" ## Example 1
## strInput = "cC" ## Example 2
strInput = "A" ## Example 3
arrTemp = []
strTemp = strInput[0]
for charLoop in strInput[1:]:
if charLoop.lower() == strTemp[-1].lower():
strTemp = strTemp + charLoop
else:
arrTemp.append(strTemp)
strTemp = charLoop
arrTemp.append(strTemp)
nMaxLen = 0
arrOutput = []
for strLoop in arrTemp:
if not IsStrNice(strLoop):
continue
if len(strLoop) < nMaxLen:
continue
if len(strLoop) > nMaxLen:
nMaxLen = len(strLoop)
arrOutput = [strLoop]
else:
arrOutput.append(strLoop)
print (", ".join(arrOutput))
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