def METHOD_NAME(strains, probeset_vals):
    trimmed_strains = []
    #print("probeset_vals is:", pf(probeset_vals))
    first_probeset = list(probeset_vals.values())[0]
    print("\n**** first_probeset is:", pf(first_probeset))
    for strain in strains:
        print("\n**** strain is:", pf(strain))
        if strain in first_probeset:
            trimmed_strains.append(strain)
    print("trimmed_strains:", pf(trimmed_strains))
    return trimmed_strains