l=["GRB","GBR","BGR","BRG","RBG","RGB"]
t=int(input())
for i in range(t):
    n=int(input())
    if n==1:
        print(l[0])
    elif n==2:
        print(l[1])
    elif n==3:
        print(l[2])
    elif n==4:
        print(l[3])
    elif n==5:
        print(l[4])
    elif n==6 or n%6==0:
        print(l[5])
    elif n>6 and n%6 !=0:
        cap= n%6
        print(l[cap-1])