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## strInput = "a1c1e1" ## Example 1
## strInput = "a1b2c3d4" ## Example 2
## strInput = "b2b" ## Example 3
strInput = "a16z" ## Example 4
arrList = list(strInput)
arrPosNum = [nIndx for nIndx, charLoop in enumerate(strInput) if charLoop.isdigit()]
arrPosChar = [nIndx for nIndx, charLoop in enumerate(strInput) if charLoop.isalpha()]
## print (arrPosNum)
## print (arrPosChar)
for nIndx in arrPosNum:
LastChar = strInput[[nLoop for nLoop in arrPosChar if nLoop < nIndx][-1]]
arrList[nIndx] = chr(ord(LastChar) + int(arrList[nIndx]))
print ("".join(arrList))
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