Putting text over a specific grid using Pygame

Question

import pygame as pg

width = 350
background_color = (255,255,255)


def main():
    pg.init()
    window = pg.display.set_mode((width,width))
    pg.display.set_caption("Wumpus World")
    window.fill(background_color)

    for i in range(0,3):
        pg.draw.line(window , (0,0,0) , (90+90*i,0),(90+90*i,400),2)
        pg.draw.line(window, (0, 0, 0), (0,90+90*i), (400,90+90*i), 2)

    pg.display.update()


    while True:
        for event in pg.event.get():
            if event.type == pg.QUIT:
                pg.quit()
                return

main()

The above code I have written to draw 4x4 grid for wumpus world board only. I am not getting where and how to put text of agent,start,stench,pit etc on the specific grids