#exec(open("Tanya02.py").read())

def getG (st):
    filt_Rips = list(st.get_filtration())

    G = []
    for x1 in filt_Rips:
        if x1[1] < float("inf"):
            for x2 in x1[0]:
                if not x2 in G:
                    G.append(x2)
    return G