from tkinter import *

window = Tk()

window.title("Welcome to Tkinter!")

# window size and position:
# width x height + xoffset + yoffset.
window.geometry('400x300+30+200')  # no spaces in spec!



for j in range(7):
    for i in range(5):
        lbl = Label(window, text="Hello_"+str(i)+str(j)+"   " )
        lbl.grid(column=j, row=i)


window.mainloop()