Guitar chords: C no third
B(no3rd)
X   XX
======
~~~~~~
------
|1|||| 3rd fret
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||||||
------
||34||
------
||||||
------
 CGC

or:


X  XXX
======
~~~~~~
------
|1|||| 3rd fret
------
||||||
------
||3|||
------
||||||
------
 CG

Notes:
1 : C
5 : G