from math import factorial

def nth_permutation(word,n):
    factoradic=[]
    word=list(word)
    for i in range(len(word) - 1, -1, -1):
        f=factorial(i)
        factoradic.append(n//f)
        n=n%f  
    return ''.join([word.pop(j) for j in factoradic])
t=int(input().strip())
for _ in range(t):
    n=int(input().strip())
    word='abcdefghijklm'
    print(nth_permutation(word,n-1))