die Geschichte des Mannes

Note

one syllable words ending in a consonant + es
1. des Mannes
2. des Kindes
3. des Hauses
4. des Mondes (of the moon)

longer words ending in consonants + s
1. des Computers

words ending in vowels take s
1. des Kaffees

finally there is a group of weak masculine nouns, mostly describing people or animals ending in n. Watch out for those, when they come up

Breakdown of die Geschichte des Mannes