import re
SQRT=.5.__rpow__
a=[_[:-1].split('	')for _ in re.sys.stdin]
def E(s,t={}):
	v=t.get(s,s)
	if'<'<v<'>':t[s]=v=eval(re.sub('(\w)(\d+)',r'E(a[\2-1][ord("\1")-65])',s[1:]))
	try:v=float(v)
	finally:return v
for _ in a:print'	'.join(int>type(v)and"%.8g"%round(v,2)or v for v in map(E,_))