d={'v':lambda x: sum([[j-1,j+1] for j in x],[]),'<':lambda x:x[1:],'>':lambda x:x[:-1],'^':lambda x:[sum(x)],'/':lambda x:[reduce(long.__mul__,x,1L)]}
while 1:
 x=[0L]
 for c in raw_input():x=d[c](x)
 print `x`.replace('L','')