X=['ABDCC','AAFCC','ACADE']
def f(x):
  X=[0]*8
  c=0
  while x:
    X[x&7]+=1
    x>>=3
    c+=1
  if X[0]==0 and len(set(X[1:8]))==1:
    return 1
  return 0

for t in range(int(input())):
  N=int(input())
  A=''
  if N%3==1:
    A='12'
  elif N%3==2:
    A='252'
  else:
    A=''
  A+='5252'*(N//3)
  if len(A)%7:
    print(-1)
    continue
  x=len(A)
  S=''
  while x>=28:
    x-=28
    S+='ACCACCCCCCCCABACAAFFE'
  T=''
  while x:
    T+=X[x//7-1]
    x-=7
  S=T+S
  print(S)