I couldnt find the intro anywhere so i taught myself and pretty sure its right!
Standard tuning
[ Tab from: https://www.guitartabs.cc/tabs/f/forever_the_sickest_kids/bundle_up_tab_ver_3.html ]
e|--------------------------------------------------|
b|--------------------------------------------------|
g|-----7-------7------7-------7------7------7-------|
d|-------7-------7-------7------7------7------7-----|
a|---------5-------5-------------5------5-----------|
e|------tabbed by Alex Lorenzoni--------------------|
e|----5------5------5----5-----5------5------5----------|
b|-------------------------------------------5----------|
g|------7------7------7---7------7-----7-----7----------|
a|-------7------7----------7------7----------7----------|
e|---tabbed by Alex Lorenzoni------------------5--------|