ABC-362 A - Buy a Pen

def getIntList():
    return list(map(int, input().split()))
 
 
def getString():
    return input()
 
 
def main():
    RGB = getIntList()
    C = getString()
 
    cname = ["Red", "Green", "Blue"]
    x = cname.index(C)
    RGB[x] = 100
 
    print(min(RGB))
 
 
if __name__ == "__main__":
    main()