https://www.wolframalpha.com/input/?i=substitution%20system%201-%3E0%2C%200-%3E10
substitution system 1-0, 0-10 - Wolfram|Alpha
system 1 0substitution10wolframalpha
https://www.wolframalpha.com/input?i=substitution+system+1-%3E2%2C+2-%3E31%2C+3-%3E24%2C+4-%3E15%2C+5-%3E2
substitution system 1-2, 2-31, 3-24, 4-15, 5-2 - Wolfram|Alpha
substitution system1 231 3