f = open('input.txt', 'r')
d = dict()
for line in f:
    s = line.split()
    if (s[0] = 'DEPOSIT'):
        if (s[1] not in d):
            d[s[1]] = 0
        d[s[1]] += int(s[2])
    elif (s[0] = 'INCOME'):
        if (s[1] not in d):
            d[s[1]] = 0
    elif (s[0] = 'BALANCE'):
        print(d[s[1]])
    elif (s[0] = 'TRANSFER'):
        if (s[1] not in d):
            d[s[1]] = 0
        if (s[2] not in d):
            d[s[2]] = 0
        d[s[2]] += int(s[3])
        d[s[1]] -= int(s[3])
    elif (s[0] = 'WITHDRAW'):
        if (s[1] not in d):
            d[s[1]] = 0
        d[s[1]] -= int(s[2])