It is a play on words (or a word) where a text can be read as much from left to right as from right to left (accentuation is ignored and in the case of a sentence also the spaces and punctuation marks). The name is of Greek origin, '960; 945; 955; 953; 957; 948; 961; 959; 956; 959; 962;' (palin dromos) means "to travel a route again, to go back the way". See capicúa .
