fi = open('BAI2.INP', 'r')
fo = open('BAI2.OUT', 'w')
s = fi.read()
x = '0'
res = ''
for i in s:
    if i.isdigit():
        if i >= x[-1]:
            x += i
        elif len(x) > 2:
            res += x[1:]
            x = '0' + i
        else:
            x = '0' + i
    elif len(x) > 2:
        res += x[1:]
        x = '0'
    else:
        x = '0'
fo.write(res)
fi.close()
fo.close()