Calculating_Protein_Mass.py

protein = input()

d = {
    'A':   71.03711,
    'C':   103.00919,
    'D':   115.02694,
    'E':   129.04259,
    'F':   147.06841,
    'G':   57.02146,
    'H':   137.05891,
    'I':   113.08406,
    'K':   128.09496,
    'L':   113.08406,
    'M':   131.04049,
    'N':   114.04293,
    'P':   97.05276,
    'Q':   128.05858,
    'R':   156.10111,
    'S':   87.03203,
    'T':   101.04768,
    'V':   99.06841,
    'W':   186.07931,
    'Y':   163.06333,
}

S = 0
for i in protein:
    S += d[i]

print(round(S, 3))