#!/bin/python3
import sys

if len(sys.argv) < 2:
    l = 'sample text'
else:
    l = sys.argv[1]
print('$$', end='', sep='')
c = 0
colors = ['#ff0000',
        '#ff7f00',
        '#ffff00',
        '#00ff00',
        '#0000ff',
        '#4b0082',
        '#9400d3']

for x in l:
    if x.isspace():
        print('\\text{',x,'}', end='', sep='')
        continue
    c = (c+1)%7
    print('\color{',colors[c],'}\\text{',x,'}', end='', sep='')
print('$$')