def Skew(Genome):
    SkewArray = []
    SkewArray.append(0)
    for i in (1, len(Genome)):
        if Genome[i-1] == "G":
            SkewArray.append(SkewArray[i-1]+1)
        if Genome[i-1] == "C":
            SkewArray.append(SkewArray[i-1]-1)
        else:
            SkewArray.append(SkewArray[i-1])
    return SkewArray