r=reduce
s=input()
for n in')]}>':s=s.replace(n,'),')
for a in'(*x:sum(x)','[a=-1,*x:a-sum(x)','{*x:r(int.__mul__,x,1)','<a=1,*x:r(int.__div__,x,a)':s=s.replace(a[0],'(lambda %s)('%a[1:])
print eval(s)[0]
cj1yZWR1Y2UKcz1pbnB1dCgpCmZvciBuIGluJyldfT4nOnM9cy5yZXBsYWNlKG4sJyksJykKZm9yIGEgaW4nKCp4OnN1bSh4KScsJ1thPS0xLCp4OmEtc3VtKHgpJywneyp4OnIoaW50Ll9fbXVsX18seCwxKScsJzxhPTEsKng6cihpbnQuX19kaXZfXyx4LGEpJzpzPXMucmVwbGFjZShhWzBdLCcobGFtYmRhICVzKSgnJWFbMTpdKQpwcmludCBldmFsKHMpWzBd