'''
Created on Mar 12, 2015

@author: user
'''

size = {'char' : 1,
        'short' : 2,
        'int' : 4}

if __name__ == '__main__':
    s = 'string'
    solg = []
    
    while True:
        s = raw_input()
        if s=='':
            break
        s = s.split(' ')
        sol = 0
        i = 0
        if s[i] == 'unsigned':
            i += 1
        if len(s) > i+1:
            name = s[i+1].split(',')
        else:
            print '0'
            continue
        for element in name:
            if not '[' in element:
                sol += size[s[i]]
            else:
                j = 0
                l = []
                while j < len(element):
                    nr = 0
                    found = False
                    if element[j] == '[':
                        while True:
                            j += 1
                            if element[j] == ']':
                                found = True
                                break
                            nr = nr * 10 + int(element[j])
                    if found:
                        l.append(nr)
                    j = j + 1
                n = 1
                for e in l:
                    n *= e
                sol += n * size[s[i]]
        solg.append(sol)
    
    
    for element in solg:
        print element