t = int(input())
def toWord(n):
if n == 1: return "one"
elif n == 2: return "two"
elif n == 3: return "thr"
elif n == 4: return "fou"
elif n == 5: return "fiv"
elif n == 6: return "six"
elif n == 7: return "sev"
elif n == 8: return "eig"
elif n == 9: return "nin"
elif n == 0: return "zer"

def toSum(s):
number = int(s)
if number == 0: return 0
elif number%9 == 0: return 9
else: return number%9
for i in range(t):
a = [x for x in input().split()]
n = a[0]
name = a[1]
d1 = 0
if "." in n:
d1 = n.index('.')
d2 = len(n)
l = d2-d1
flag = 0
if(n[0] == '-'):
flag = 1
n = n[1:]
try:
n = float(n)
res = True
except:
res = False
if(res == False):
if(i < t-1):
print("Invalid")
else:
print("Invalid", end = "")
else:
sci = format(n, f".{l}e")
part = sci.split('e')
num = part[0].split('.')
k = int(part[1])
if(flag == 1): res = "-"
else: res = ""
res += toWord(int(num[0])) +"."+toWord(toSum(num[1])) +"e"
if(k > 0):
res += '+'
elif(k<0): res += '-'
res += toWord(abs(int(part[1]))) +"@"
if(k%2 != 0):
for x in range(0,len(name),2):
res += name[x]
else:
for x in range(1,len(name),2):
res += name[x]

if(i < t-1):
print(res)
else:
print(res, end="")

----- PICK UP SERVICE -----


from collections import defaultdict

def pick_up_service(N, start, connections):
graph = defaultdict(list)

taxes = defaultdict(int)

for i in range(N - 1):
city1, city2, goods, tax = connections[i]
# graph[city1].update({city2: (goods, tax)})
# graph[city2].update({city1: (goods, tax)})
graph[city1].append((-1 * goods, tax, city2))
taxes[city2] = tax


route = []

# print(graph)
def dfs(city):
route.append(city)
for n in sorted(graph[city]):
dfs(n[2])
route.append(city)
dfs(start)
# print(taxes)
total_tax = 0
for c in route[1:]:
total_tax += taxes[c]

return route, total_tax



N = int(input())

# print("n is ", N)
# print("r is ", r.split('\n'))

cons = []

for _ in range(N-1):
l = input()
ls = l.split()
cons.append((ls[0], ls[1], int(ls[2]), int(ls[3])))



ans, t = pick_up_service(N, cons[0][0], cons)

print("-".join(ans))
print(t, end="")

SAB LOG SUBSCRIBE KARO

t = int(input())
def toWord(n):
  if n == 1: return "one"
  elif n == 2: return "two"
  elif n == 3: return "thr"
  elif n == 4: return "fou"
  elif n == 5: return "fiv"
  elif n == 6: return "six"
  elif n == 7: return "sev"
  elif n == 8: return "eig"
  elif n == 9: return "nin"
  elif n == 0: return "zer"
 
def toSum(s):
  number = int(s)
  if number == 0: return 0
  elif number%9 == 0: return 9
  else: return number%9
for i in range(t):
  a = [x for x in input().split()]
  n = a[0]
  name = a[1]
  d1 = 0
  if "." in n:
    d1 = n.index('.')
  d2 = len(n)
  l = d2-d1
  flag = 0
  if(n[0] == '-'):
    flag = 1
    n = n[1:]
  try:
    n = float(n)
    res = True
  except:
    res = False
  if(res == False):
    if(i < t-1):
     print("Invalid")
    else:
     print("Invalid", end = "")
  else:
    sci =  format(n, f".{l}e")
    part = sci.split('e')
    num = part[0].split('.')
    k = int(part[1])
    if(flag == 1): res = "-"
    else: res = ""
    res += toWord(int(num[0])) +"."+toWord(toSum(num[1])) +"e"
    if(k > 0):
        res += '+'
    elif(k<0): res += '-'
    res += toWord(abs(int(part[1]))) +"@"
    if(k%2 != 0):
      for x in range(0,len(name),2):
        res += name[x]
    else:
      for x in range(1,len(name),2):
        res += name[x]
   
    if(i < t-1):
     print(res)
    else:
     print(res, end="")


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