def fun(a, l):
larr = []
rarr = []
c=0
k=0
m = int(l/2)
op = a[m]
for i in a:
c+=1
if c > m:
rarr.append(i)
elif c<m:
larr.append(i)
dig = ['zero','one' , 'two' ,'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'ten']
for i in range(len(rarr)):
for k in range(len(dig)):
if i < len(rarr):
if rarr[i] == dig[k]:
rarr[i] = k
if i < len(larr):
if larr[i] == dig[k]:
larr[i] = k
#prit()
return rarr, larr
def fun2(a, b):
m = len(a)-1
m1 = len(b)-1
e=0
f = 0
for i in a:
if m < 0:
break
e += i*(10**m)
m-=1
for i in b:
if m1 < 0:
break
f += i*(10**m1)
m1-=1
return e, f
def add(a, l):
r, l = fun(a, l)
r.pop()
res1, res2=fun2(r, l)
res = res1+res2
print(res)
while True:
try:
s = input().split()
if s[0] == 'zero' and s[2] == 'zero':
break
a = len(s)
add(s, a)
except:
break