动物重量排序

ls1 = []
while True:
    element = input().split()
    if len(element) != 0:
        ls1.append(element)
    else:
        break

ls2 = sorted(ls1, key=lambda x:float(x[1][:-1])*1000 if x[1][-1]=='t' else float(x[1][:-2]))
print(ls2)