This is the Theme of the TV-Sitcom "How I met your mother".
All chords have the same length. The text is just "Babababahhh..."
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G D Em G C G C D G
Babababaah Bababaaah Baah BaBaah Babababababababaah
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Source: https://tabs.ultimate-guitar.com/tab/the_solids/how_i_met_your_mother_theme_chords_1032148